DE102014208896B4 - Printing machine with a supply system for coating agents - Google Patents

Abstract

The invention relates to a printing machine which has a printing unit and a supply system for coating agents, wherein the printing unit has two print heads arranged on a movable nozzle bar and wherein the supply system has at least one normal supply, a return memory and an intermediate memory, and each of the print heads via a liquid line with the normal supply is connected and wherein the normal supply has an overflow outflow which is connected to the intermediate storage via the return storage tank and a discharge line and wherein the at least one normal supply and the return storage are arranged movably together with the nozzle bar and wherein the nozzle bar is optionally at least either by means of a positioning device can be arranged in a printing position assigned to it or at least in a maintenance position assigned to it, and a section of the discharge line ang between the overflow drain and the return reservoir is arranged, within which a valve is arranged.

Description

The invention relates to a printing machine with a supply system for coating agents according to the preamble of claim 1.

Different printing processes are known that can be used in printing machines. One such printing method is ink jet printing or ink jet printing. In this case, individual drops of printing ink are ejected from nozzles of print heads and transferred to a printing substrate in such a way that a printed image is produced on the printing substrate. Different print images can be created by individually controlling a large number of nozzles. There is no fixed printing form, so it is possible to design each individual print product individually. As a result, personalized printed products can be produced and / or, due to the saving of printing forms, small editions of printed products can be produced at low cost.

An exact match of a print image on the front and back of a substrate printed on both sides is called a register (DIN 16500-2). In multi-color printing, one speaks of register (DIN 16500-2) when individual print images of different colors are put together exactly to match one image. Suitable measures must also be taken in connection with inkjet printing in order to maintain register and / or register.

Through the EP 2 202 081 A1 and the JP 2003-063707 A a printing machine is known in each case, the printing machine having a first printing unit and a dryer, the first printing unit having a central cylinder with its own drive motor assigned to the first central cylinder and at least one inkjet print head.

Through the U.S. 5,566,616 A a printing machine is known which has a rotatable central cylinder, inkjet print heads, a cooling device and a dryer which works either with temperature and air flow or with radiation-induced crosslinking.

Through the U.S. 6,053,107 A a printing machine is known which has a driven central cylinder and a dryer with a cooling device.

Through the DE 10 2011 076 899 A1 a printing machine is known which has at least one printing unit and at least one printhead designed as an inkjet printhead.

Through the DE 10 2010 001 146 A1 and the DE 43 18 299 A1 a drawing means for drawing web-like printing material into a printing machine is known in each case. Through the EP 1 197 329 A1 a drawing-in point is known which can interact with a drawing-in tape or a drawing-in chain. Through the US 2011/0043554 A1 a printing machine is known in which at least one printing substrate guide element is removed from at least one print head in order to pull in a material web.

Through the DE 10 2004 017 801 A1 , the US 2005/0024421 A1 , the DE 10 2010 037 829A1 , the JP 2004 268 511 A , the US 2006/0119646 A1 , the U.S. 5,206,666 A , the U.S. 5,757,399 A and the US 7 455 401 B2 a printing machine with print heads and maintenance device which can be moved along a travel path is known in each case. Through the US 2011/0149004 A1 a printing machine with printheads which can be moved along a travel path is known. the US 8 262 198 B2 shows a printing machine with adjustable print heads. the DE 23 49 453 A1 shows movable nozzles of a liquid jet recorder.

Through the US 2009/0284566 A1 A printing machine is known in which, by means of four positioning devices, print heads can be moved in different directions which are linear for reasons of positional accuracy and can be fed to a stationary maintenance device by moving them parallel to an axis of rotation of a printing substrate guide element.

Through the DE 10 2005 060 786 A1 , the EP 2 127 885 A1 and the US 2008/0273063 A1 a printing machine is known which has at least one supply system for coating agents and at least two inkjet print heads, both of which are arranged connected to a normal supply via a liquid line, the normal supply being connected to an intermediate store via a supply line and a discharge line.

Through the US 2008/0055378 A1 A printing machine is known in which a print head oscillating in the horizontal direction is supplied with ink, a supply system having a normal supply with overflow, a first catch basin connected to the overflow, a return reservoir, to maintain the pressure conditions at an input and output of the print head having a second collecting basin adjoining the return storage tank and an intermediate storage tank. A line having a valve connects the first collecting basin with the second collecting basin. The print head is connected to the normal supply and the return memory.

The invention is based on the object of creating a printing press with a supply system for coating agents.

The object is achieved according to the invention by the features of claim 1.

A printing press preferably has at least one printing unit, the at least one printing unit preferably having at least one print head, in particular designed as an inkjet print head, and preferably at least one printing material guide element rotatable about an axis of rotation, and wherein the at least one print head can preferably be arranged in at least one rest position, preferably designed as a maintenance position, in which preferably at least one maintenance device is assigned and / or can be assigned to at least one nozzle of the at least one print head. The at least one print head can preferably be arranged in at least one printing position. An ejection direction of at least one nozzle of the at least one print head is preferably aligned at least in one printing position with a lateral surface of the at least one printing material guide element. The at least one maintenance device is preferably designed as at least one protective cover and / or as at least one cleaning device.

The at least one printing unit preferably has the at least one printing material guide element which is rotatable about an axis of rotation that defines an axial direction. The at least one printing unit preferably has at least four print heads, in particular designed as inkjet print heads. At least four positioning devices are preferably arranged in the at least one printing unit, by means of which at least one print head can optionally be arranged at least either in a respective printing position assigned to it or in a respective rest position assigned to it, in particular a maintenance position and / or assembly position. In particular, at least one first print head of the at least four print heads can be arranged, in particular by means of at least one first positioning device, optionally at least either in a first printing position assigned to it or in a first rest position assigned to it, in particular first maintenance position and / or first assembly position. In particular, at least one second print head of the at least four print heads, in particular by means of at least one second positioning device, can optionally be arranged at least either in a second printing position assigned to it or in a second idle position assigned to it, in particular a second maintenance position and / or a second assembly position. The respective rest position is preferably designed as a respective maintenance position, in which at least one maintenance device designed as a cleaning device is furthermore preferably assigned and / or assignable to at least one nozzle of the respective print head. One advantage is that this makes it possible to create a particularly compact printing unit because the maintenance device and the print heads only have to be moved short distances relative to one another.

In particular, the first rest position is preferably designed as a first maintenance position, in which at least one first maintenance device designed as a first cleaning device is assigned and / or can be assigned to at least one nozzle of the first print head. In particular, the second rest position is preferably designed as a second maintenance position in which at least one second maintenance device designed as a second cleaning device is assigned and / or can be assigned to at least one nozzle of the second print head. In particular, at least one third rest position of a third print head is preferably designed as a third maintenance position, in which at least one third maintenance device designed as a third cleaning device is assigned and / or can be assigned to at least one nozzle of the third print head. In particular, at least one fourth rest position of a fourth print head is preferably designed as a fourth maintenance position, in which at least one fourth maintenance device designed as a fourth cleaning device is assigned and / or can be assigned to at least one nozzle of the fourth print head.

The at least one maintenance device is preferably arranged so as to be movable at least partially orthogonally to the axial direction along a provision path. In particular, the at least one first maintenance device is preferably arranged movably along a first provision path at least orthogonally to the axial direction. In particular, the at least one second maintenance device is preferably arranged so as to be movable at least orthogonally to the axial direction along a second provision path.

Preferred is a minimum distance, preferably referred to as the rest distance, in particular the maintenance distance and / or assembly distance, between at least one first nozzle of the at least one first print head in its first rest position and at least one second nozzle of the at least one second print head in its second rest position by at least 2 cm further preferably at least 5 cm, even more preferably at least 10 cm and even more preferably at least 20 cm greater than a minimum distance, preferably referred to as the working distance, between at least the at least one first nozzle of the at least one first print head in its first printing position and the at least one second nozzle of the at least a second printhead in its second Print position. This results in the particular advantage that the at least four print heads are more accessible when they are to be serviced and / or complained about and are nevertheless arranged as close to one another as possible during printing, so that a high print quality can be achieved because there are fewer negative influences between applications of printing inks of different colors are possible.

In the foregoing and in the following, printing ink is generally understood to mean a coating agent, in particular also a lacquer. In particular, a distinction should not be made between printing ink and an ink, but rather printing ink and coating agent should also be understood to mean, in particular, ink.

For example, print heads are designed in such a way that each individual print head does not extend over an entire working width of the printing machine that is defined by a maximum printing material width that can be processed with the printing machine. A plurality of print heads are then preferably assigned to the same printing ink and / or at least one nozzle bar is preferably arranged, which furthermore preferably contains a plurality of print heads which can be moved jointly by means of the same positioning device. In particular, at least four positioning devices are preferably arranged in the printing unit, by means of which in each case at least one nozzle bar and / or in each case several print heads assigned to the same printing ink are designed to be jointly movable and in particular optionally at least either in a respective printing position assigned to them or in a respective printing position assigned to them , their respective rest position assigned to them can be arranged or are. The positioning devices are preferably positioning devices of the printing unit and in particular components of the printing unit. In particular, the at least one print head is preferably arranged to be movable away from a transport path provided for at least one printing substrate web by means of at least one positioning device. The at least one printing unit preferably has at least two, in particular at least four nozzle bars, each of which has at least two, in particular at least four print heads, and the at least two, in particular at least four nozzle bars are arranged movably by means of a respective positioning device along a respective linear travel path. The printing press is preferably characterized in that each nozzle bar can be moved individually and independently of other nozzle bars along its travel path and / or in its printing position and / or its rest position by means of the positioning device assigned to it.

The at least one printing unit preferably has at least one positioning device for each double row of print heads arranged in the printing unit and / or at least one positioning device for each nozzle bar arranged in the printing unit and / or at least one positioning device for each coating agent arranged in the printing unit.

The printing press is preferably characterized in that the at least one maintenance device is arranged to be movable by means of at least one feed device along at least one supply path between at least one parking position and at least one use position. The at least one maintenance device is preferably at least orthogonal to the axial direction A. movably arranged. The printing press is preferably characterized in that the respective maintenance device in its respective operating position is assigned to the respective at least one nozzle of the respective print head in its maintenance position. With each print head arranged in its printing position, at least one nozzle of this respective print head is preferably arranged below the supply path of the respective at least one maintenance device and with each print head arranged in its rest position this respective at least one nozzle is arranged above this respective supply path.

The respective supply path of the in particular four maintenance devices preferably runs linearly and in a respective or common direction which deviates from a horizontal direction by at most 45 °, preferably at most 30 °, more preferably at most 20 ° and even more preferably at most 10 °. The respective or common provision direction is preferably horizontal.

The printing press is preferably characterized in that a position of at least one reference nozzle of a respective print head in its printing position and a position of this at least one reference nozzle of the respective print head in its maintenance position is based on an axial direction determined by the axis of rotation of the at least one printing substrate guide element by at most 50 % of a width measured in the axial direction of a working area of a nozzle bar having the respective print head and / or at most 50% of a working width of the printing machine established by a maximum printing material width that can be processed with the printing machine. This enables a particularly space-saving printing machine to be implemented, which is nevertheless easy to maintain and whose print heads are preferably easy to assemble and dismantle. In particular, the printing press is preferably characterized in that one position of the at least one first nozzle is in the at least one printing position and one position of this at least one first nozzle is in the at least one maintenance position in an axial direction determined by the axis of rotation of the at least one printing substrate guide element, based on a maximum of 50% of the width of the working area of the nozzle bar having the at least one print head and / or a maximum of 50% of that which can be processed with the printing press by the maximum, measured in the axial direction Differentiate the working width of the printing machine set on the printing material.

In the at least one maintenance position of the respective print head, at least one maintenance device is preferably assigned and / or assignable to at least one nozzle of the at least one print head and further preferably the at least one maintenance device is at least partially with respect to a respective ejection direction of the at least one nozzle arranged opposite one another and / or can be arranged.

The printing press is preferably characterized in that at least a first of at least two print heads, in particular a first printing unit, can optionally be arranged by means of a first positioning device assigned to it, either at least either in the first printing position assigned to it or in a first rest position assigned to it, in particular a maintenance position and / or assembly position can be arranged, wherein in the at least one first rest position a rest position of at least one first nozzle of the at least one first of the at least two print heads has a first rest distance, in particular maintenance distance and / or assembly distance from a first working position of the same at least one first nozzle of the at least one first which has at least two print heads in its first printing position. At least one second of the at least two print heads, in particular this first printing unit, can preferably be arranged either in a second printing position assigned to it or in a second idle position assigned to it, in particular a maintenance position and / or assembly position, preferably in each case by means of a second positioning device assigned to it, wherein in the at least one second rest position a rest position of at least one second nozzle the at least one second of the at least two print heads a second rest distance, in particular maintenance distance and / or assembly distance from a second working position of the same at least one second nozzle of the same at least one second of the at least two print heads in its second printing position having.

The first rest distance, in particular maintenance distance and / or assembly distance, differs from the second rest distance, in particular maintenance distance and / or assembly distance, by at least 2 cm, more preferably at least 5 cm, even more preferably at least 10 cm and even more preferably at least 20 cm. In particular, a rest distance is a distance between a position of a nozzle when the print head is arranged in its rest position and has this nozzle and a position of the same nozzle when the same print head is arranged in its printing position. This results in the particular advantage that, for example, a straight and thus simple and inexpensive feed device can be arranged, by means of which a maintenance device can be used on different print heads. Another advantage is that there is enough space available for all maintenance positions in their respective operational positions. Preferably, at least two of the total of at least four print heads, which are preferably arranged on different positioning devices, each have the same resting distances in pairs, which are arranged on different positioning devices. This results, for example, from a symmetry of an arrangement of the positioning devices, with, for example, a plane of symmetry completely containing the axis of rotation of the at least one printing substrate guide element.

The printing machine is preferably characterized in that, with a third print head arranged in its rest position, a rest position of at least one third nozzle of the at least one third print head has a third rest distance from its working position at least one third nozzle of the same has at least one third print head in its third print position and that, when the fourth print head is arranged in its rest position, a rest position of the at least one fourth nozzle of the at least one fourth print head has a fourth rest distance from a working position of the same at least one fourth nozzle of the same has at least one fourth print head in its fourth printing position and that the third rest distance is equal to the second rest distance and / or that the fourth rest distance is equal to the first rest distance.

The printing press is preferably characterized in that, when the, in particular, first print head is arranged in the, in particular, first maintenance position, at least one, in particular, first maintenance device is located between the at least one, in particular, first nozzle of the at least one, in particular first, print head and one of these at least one, in particular, first nozzle region of the transport path provided for the printing material can be arranged and / or arranged and / or that in the case of the at least one, in particular first maintenance position, in particular first print head at least an in particular first maintenance device can be arranged and / or arranged between the at least one in particular first nozzle of the at least one in particular first print head and an area of a transmission body closest to this at least one in particular first nozzle.

The printing press, which preferably has at least one printing unit, which preferably has at least two and more preferably at least four print heads and at least one printing material guide element that can be rotated about an axis of rotation defining an axial direction, is preferably characterized in that each of the at least two print heads has a respective one , at least this printhead associated positioning device is arranged movable along a respective linear adjustment path, wherein the linear adjustment paths point in respective adjustment directions that differ in pairs by at least 10 ° and at most 150 °. Furthermore, each of the at least two print heads can optionally be arranged by means of the respective positioning device at least either in a printing position assigned to it or at least in a maintenance position assigned to it. Preferably, in the at least one maintenance position of a first print head of the at least two print heads, at least one maintenance device is assigned and / or can be assigned to at least one first nozzle of this at least one first print head. Furthermore, the at least one maintenance device is preferably arranged so as to be movable at least partially orthogonally to the axial direction along at least one provision path between at least one parking position and at least one use position by means of at least one feed device. This results in the particular advantage that the printing unit can be made very compact. By arranging the linear adjustment paths at appropriate angles, for example around a central cylinder, less installation space is required than if all the print heads were arranged to be movable in the axial direction or in opposite directions. The at least partially orthogonal mobility of the maintenance device also promotes a compact design of the printing unit, in particular because the maintenance device can be as wide as the working area of the nozzle bar and the printing unit still need not be twice as wide. In contrast to print heads which can be moved parallel to one another, there is an enlarged spatial area for maintenance devices in their operational positions with the print heads at the same time very close to one another.

The printing machine preferably has at least one printing unit, which preferably has at least one print head designed as an inkjet print head. The at least one printing unit preferably has at least one printing material guide element that can be rotated about a respective axis of rotation. The at least one print head is preferably designed to be movable along an adjustment path in at least one adjustment direction, the adjustment direction preferably having at least one component that is oriented orthogonally to the axial direction defined by the axis of rotation of the at least one printing substrate guide element. The printing press is preferably characterized in that at least one and preferably exactly one, preferably endless, pull-in means for pulling in a printing substrate web, which can be moved along at least one pull-in path, is arranged and / or can be arranged at least temporarily within a printing unit, and that at least parts of the at least one pull-in path on the axial direction related to each target area of each nozzle of each print head of this printing unit have a distance of at least 2 cm. Preferably at least parts of the at least one retraction path and preferably the complete retraction path in the axial direction to each target area of each nozzle of each print head of this printing unit have a distance of at least 2 cm, more preferably at least 4 cm, even more preferably at least 6 cm and even further preferably at least 8 cm. Preferably, at least parts of the pulling means and more preferably the complete pulling means have a distance of at least 2 cm, more preferably at least 4 cm, even more preferably at least 6 cm and even more preferably at least to each target area of each nozzle of each print head of this printing unit in the axial direction 8 cm. This results in the particular advantage that a web of printing material can be drawn into the printing press particularly easily, quickly and precisely, and yet there is no risk that the nozzles of print heads could be damaged and / or soiled.

The printing press is preferably characterized in that at least one printing substrate web is connected and / or connectable to the at least one drawing-in means via at least one connecting element, the at least one connecting element further preferably being designed as at least one drawing-in tip. The printing press is preferably characterized in that the at least one drawing-in means is designed as at least one endless drawing-in belt and / or that at least one drawing-in guide element is arranged, by means of which the at least one drawing-in path of the at least one drawing-in means can be set and / or fixed, with further preference the at least one draw-in guide element is designed as at least one deflection roller or as at least one chain rail and / or the at least one draw-in guide element is designed as at least one rotatable draw-in guide element.

The at least one drawing-in means for drawing in a printing substrate web along the intended transport path of the printing substrate web is preferably arranged, in particular permanently, along its at least one drawing-in path within the printing press. The at least one drawing-in means preferably has at least two and more preferably at least five connection points provided, at which at least one printing substrate web can be connected to the at least one drawing-in means directly and / or via at least one connecting element. The printing press is preferably characterized in that the at least two connection points in the axial direction have a distance of at most 10 cm, more preferably at most 5 cm, even more preferably at most 2 cm and even more preferably no distance at all and / or are the at least two connection points spaced apart from one another along the at least one pull-in path. A draw-in path of the at least one draw-in means preferably encloses the at least one rotatable printing material guide element, viewed from an axis of rotation of the at least one printing material guide element, in an angular range of at least 180 ° and at least one rotatable draw-in guide element is arranged, by means of which at least one draw-in path of the at least one draw-in means can be fixed and / or is set and which is rotatably arranged about the same axis of rotation, such as at least one printing substrate guide element of a printing unit of the printing press. More preferably, the draw-in path of the at least one draw-in means has, at least along this angular range, a radius of curvature which deviates by at most 5 cm from a radius of curvature of this at least one printing substrate guide element.

The printing press is preferably characterized in that an axial projection plane is defined by a surface normal that lies parallel to the axial direction or deviates from this axial direction by at most 2 ° and that there is a projection of the transport path provided for printing material in the axial projection plane in the axial direction and a projection in the axial projection plane of the pull-in path provided for the at least one pull-in means overlap in the axial direction to at least over 25% of a length of the projection of the pull-in path provided for the pull-in means and / or that only at least one pull-in means is arranged , which is arranged in the axial direction on only one side of the intended transport path for printing material and / or whose pull-in path runs only on one side of the intended transport path for printing material.

In particular, by means of the printing machine, a method for pulling at least one printing substrate web into at least one printing unit of a printing machine can be implemented, the axial direction extending parallel to the axis of rotation of the at least one printing substrate guide element of the at least one printing unit and wherein in a shutdown process at least one print head designed as an inkjet print head the at least one printing unit is parked in at least one setting direction from a provided transport path of the at least one printing substrate web, and then at least one drawing-in means is moved along a drawing-in path through the at least one printing unit and the at least one printing substrate web along the for the at least one printing substrate web pulls provided transport path and wherein the pull-in path and the transport path are seen in an axial direction spaced from each other. This at least one adjusting direction is preferably oriented at least partially orthogonally to the axial direction.

The method is preferably characterized in that the at least one drawing-in means is connected to the at least one printing substrate web in a connecting process by means of at least one connecting element. The at least one connecting element preferably passes a printing position of the at least one print head while it is parked from the intended transport path and / or is arranged in at least one rest position and / or the at least one connecting element passes at least one target area of at least one nozzle of the at least one print head during the pulling-in process and / or no component of the at least one pulling means passes a target area of a nozzle of the at least one print head during the pulling-in process. The method is preferably characterized in that the at least one print head is then adjusted against the at least one adjustment direction and / or along an adjustment path to the intended transport path of the at least one printing substrate web and / or is positioned in its printing position in a positioning process.

The method is preferably characterized in that, in the shutdown process, at least two print heads of the at least one printing unit are shut down in a respective setting direction from a provided transport path of the at least one printing substrate web, the respective setting directions differing in pairs by at least 10 ° and at most 150 °.

The method is preferably characterized in that, in at least one operating state, the at least one pull-in means is connected to the printing substrate by means of the at least one connecting element and the at least one print head is switched off from the intended transport path and / or is arranged in at least one rest position and at least one nozzle is aligned with its ejection direction on the at least one connecting element and / or that in the at least one operating state the at least one connecting element is in contact with the at least one printing substrate guide element or with at least one transfer body and / or that the at least one pulling means in this Operating state in the axial direction to each target area of each nozzle of each print head of this printing unit has a distance of at least 2 cm.

Preferably, only at least one drawing-in means is used, which is arranged in the axial direction on only one side of the intended transport path for printing material and / or whose drawing-in path runs on only one side of the intended transport path for printing material.

The at least one first printing unit preferably has the at least two print heads, preferably arranged on at least one first movable nozzle bar, in particular designed as inkjet print heads. The printing press is preferably characterized in that the printing press has at least one supply system for coating agents and that the at least one supply system has at least one normal supply and that the at least two print heads are each connected and / or connectable to the at least one normal supply via at least one first liquid line are. For example, each of the at least two print heads is connected to and / or can be connected to the at least one normal supply via in each case at least one first liquid line. The at least one supply system preferably has at least one return memory and at least one intermediate memory. The at least one normal reservoir preferably has at least one overflow outlet, which is furthermore preferably connected and / or connectable to the at least one intermediate storage tank via the at least one return storage tank and at least one discharge line and / or which is preferably designed as at least one passive overflow outlet. The at least one normal supply and the at least one return reservoir are preferably arranged to be movable together with the at least one nozzle bar. The at least one nozzle bar can preferably be arranged by means of at least one of the positioning devices, in particular at least one of the positioning devices of the at least one printing unit, optionally at least either in a printing position assigned to it or at least in a maintenance position assigned to it.

A section of the at least one discharge line, within which at least one valve, in particular at least one second valve, is arranged, is preferably arranged between the at least one overflow outlet and the at least one return reservoir. At least a first one is preferably arranged within at least one supply line, with the at least one intermediate store preferably being connected and / or connectable to the at least one normal supply line via at least one supply line. At least one first liquid pump is preferably arranged in the at least one feed line.

One advantage is in particular that the at least one valve arranged within the discharge line between the at least one overflow outlet and the at least one return reservoir enables the at least one normal reservoir and the at least one return reservoir to be separated. As a result, for example, a pressure can be increased within the normal supply in order to carry out a nozzle cleaning of the print head and at the same time and independently of this, coating agents can be removed from the at least one return reservoir. In particular, the joint mobility of the at least one return reservoir with the at least two print heads ensures that the coating agent can flow away from the overflow drain even when the positioning device is arranged in the maintenance position, always under constant conditions and thus in an optimized manner, for example caused exclusively by gravity. This advantage arises in particular if the at least one return reservoir is arranged along the at least one discharge line after the at least one overflow drain and upstream of any pump. At least one return pump is preferably arranged along the at least one discharge line after the at least one return reservoir. Then, independently of the position of the positioning device and independently of any differently set pressure within the at least one normal reservoir, coating agent can be pumped out of the at least one return reservoir.

In particular, the advantages mentioned arise if, as is preferred, an adjusting direction of an adjusting path of the at least one nozzle bar, which can be effected in particular by means of the at least one positioning device, has at least one component in the vertical direction, which is more preferably at least 10 cm, even more preferably at least 20 cm and even more preferably is at least 30 cm, because without the appropriate measures, changes in hydrostatic pressure due to the height differences could lead to different conditions. The at least one nozzle bar is further preferably arranged to be movable relative to a frame of the printing unit by means of the at least one positioning device and the at least one intermediate store is arranged in a stationary manner relative to the frame of the printing unit. This allows a relatively large buffer be arranged, which does not have to be moved by means of the positioning device.

In addition, the at least one normal supply is preferably connected at least indirectly to at least one intermediate store via at least one supply line and at least one discharge line, and the at least one normal supply and / or the at least one discharge line has at least one overflow outlet, the outflow side of which with the at least indirectly with the at least one Intermediate storage is connected and / or arranged connectable. At least one volume provided as the first gas space is preferably arranged in the at least one normal supply, which volume is and / or can be connected to at least one first gas pump via at least one first gas line. Then there is the particular advantage that particularly constant printing conditions prevail on the print heads, thereby improving print quality and facilitating handling, for example in that fewer manual settings and / or fewer cleaning measures have to be carried out. In the at least one return reservoir there is preferably at least one volume provided as a third gas space in particular, which volume is and / or can be connected to at least one first gas pump via at least one first equalizing line. For example, a gas volume is arranged in the at least one normal supply, in which there is a normal pressure that is lower than an ambient pressure that prevails on an ejection side of at least one nozzle of the at least one print head. Further preferably, the at least one first gas line and the at least one equalizing line are separably connected and / or connectable to one another via at least one pressure regulator. In this way, the same pressure can optionally be ensured in all relevant gas spaces, but also, for example, when the first and second valves are closed, a pressure and the at least one normal supply can be increased, while pressure equalization is enabled in the third gas space, for example during a pumping process.

At least two normal supplies are preferably arranged movably together with the same at least one nozzle bar and each of these at least two normal supplies is connected and / or connectable to at least one of the at least two print heads via at least one first liquid line. In this way, a uniform hydrostatic pressure can be achieved in all print heads, even if they are arranged at different heights. For this purpose, the at least two print heads are preferably arranged at different heights on the at least one nozzle bar relative to one another and the vertical distances between each of the at least two print heads and the respective normal supply connected to it via a first liquid line are further down to a tolerance value of at most 1 cm preferably equal to at most 0.5 cm.

The printing press is preferably characterized in that the printing press has at least one first printing unit and at least one supply system for coating agents and that the at least one supply system has at least one normal supply and that each of the at least two printing heads has at least one first liquid line with the at least one normal supply connected and / or connectable is arranged and that the at least one normal supply is connected via at least one supply line and at least one discharge line with at least one intermediate storage and that the at least one normal supply and / or the at least one discharge line has at least one overflow outlet, the outflow side of which with the at least a buffer is connected and / or arranged so as to be connectable. This results in the particular advantage that constant operating conditions can be ensured for the print heads, in particular that a constant pressure prevails within the coating agent at the nozzle openings of the print heads.

For example, the printing machine is characterized in that an ejection direction of at least one first nozzle of the at least one first print head in the first printing position differs from an ejection direction of this at least one first nozzle of the at least one print head in the first rest position, in particular the maintenance position and / or assembly position Angle of at least 5 °, more preferably at least 10 °, even more preferably at least 15 ° and even more preferably at least 20 ° differs. For example, this applies analogously to all at least four print heads. However, an ejection direction of each nozzle of the at least two, in particular at least four, print heads is preferably the same in the respective printing position and in the respective rest position, in particular maintenance position, assembly position.

A position of the at least one nozzle when the print head is arranged in the at least one printing position and a position of the at least one nozzle when the print head is arranged in the at least one rest position, in particular the maintenance position and / or assembly position, preferably differ on the axial defined by the axis of rotation of the at least one printing substrate guide element Direction related by a maximum of 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of the width, measured in the axial direction, of the working area of the nozzle bar having the at least one print head and / or at most 50%, more preferably at most 20%, even further preferably at most 10% and even more preferably at most 2% of the working width of the printing machine determined by the maximum printing material width that can be processed with the printing machine. This results in the particular advantage that constant conditions during maintenance operations and / or in particular an identical or the same maintenance device are made possible for all print heads and a geometry in the printing operation can nevertheless be optimized for precisely this printing operation. A plane in which this angle is measured is preferably defined by a surface normal that is parallel to the axial direction A. lies or from this axial direction A. deviates by at most 2 °; this plane is more preferably the axial projection plane.

Embodiments of the invention are shown in the drawings and are described in more detail below.

• 1a eine schematische Darstellung einer Rollen-Druckmaschine;
• 1b eine schematische Darstellung einer Rollen-Druckmaschine mit alternativer Bahnführung;
• 2 eine schematische Darstellung eines Teils einer Druckeinheit mit einer Doppelreihe von Druckköpfen;
• 3 eine schematische Darstellung einer Druckeinheit mit mehreren Düsenbalken, deren Druckköpfe in Druckpositionen angeordnet sind;
• 4 eine schematische Darstellung einer Druckeinheit mit mehreren Düsenbalken, deren Druckköpfe in Ruhepositionen, insbesondere Wartungspositionen angeordnet sind, wobei Positionierantriebe der Übersichtlichkeit halber unterbrochen dargestellt sind;
• 5 eine schematische Darstellung einer Druckeinheit mit mehreren Düsenbalken, deren Druckköpfe in Ruhepositionen, insbesondere Montagepositionen angeordnet sind, wobei Positionierantriebe der Übersichtlichkeit halber unterbrochen dargestellt sind;
• 6 eine schematische Darstellung einer Druckeinheit mit mehreren Düsenbalken, deren Druckköpfe teilweise in Ruhepositionen, insbesondere Wartungspositionen und teilweise in Druckpositionen angeordnet sind, wobei Positionierantriebe der Übersichtlichkeit halber unterbrochen dargestellt sind;
• 7a eine schematische Darstellung einer Druckeinheit mit mehreren Düsenbalken, deren Druckköpfe teilweise in Wartungspositionen und teilweise in Montagepositionen angeordnet sind, wobei Positionierantriebe der Übersichtlichkeit halber unterbrochen dargestellt sind;
• 7b eine schematische Darstellung einer Druckeinheit mit mehreren Düsenbalken, wobei Positionierantriebe der Übersichtlichkeit halber unterbrochen dargestellt sind;
• 7c eine schematische Darstellung einer Druckeinheit mit mehreren Düsenbalken, wobei Positionierantriebe der Übersichtlichkeit halber unterbrochen dargestellt sind;
• 8a eine schematische Darstellung eines Versorgungssystems für Beschichtungsmittel;
• 8b eine schematische Darstellung eines alternativen Versorgungssystems für Beschichtungsmittel;
• 9a eine schematische Darstellung einer Druckeinheit mit vier Positioniervorrichtungen und vier Wartungsvorrichtungen, wobei mittels der beiden rechten Positioniervorrichtungen Druckköpfe in Druckpositionen angeordnet sind und mittels der beiden linken Positioniervorrichtungen Druckköpfe in beispielsweise als Montagepositionen ausgebildeten Ruhepositionen angeordnet sind und sich die Wartungsvorrichtungen in Parkpositionen befinden und wobei Normalvorräte und Rücklaufspeicher nur teilweise und exemplarisch dargestellt sind;
• 9b eine schematische Darstellung einer Druckeinheit gemäß 9a, wobei mittels der beiden rechten Positioniervorrichtungen Druckköpfe in Druckpositionen angeordnet sind und mittels der beiden linken Positioniervorrichtungen Druckköpfe in Wartungspositionen angeordnet sind und sich die beiden linken Wartungsvorrichtungen in Einsatzpositionen befinden.

Show it:

• 1a a schematic representation of a web printing machine;
• 1b a schematic representation of a web printing machine with an alternative web guide;
• 2 a schematic representation of part of a printing unit with a double row of print heads;
• 3 a schematic representation of a printing unit with a plurality of nozzle bars, the print heads of which are arranged in printing positions;
• 4th a schematic representation of a printing unit with a plurality of nozzle bars, the print heads of which are arranged in rest positions, in particular maintenance positions, positioning drives being shown interrupted for the sake of clarity;
• 5 a schematic representation of a printing unit with a plurality of nozzle bars, the print heads of which are arranged in rest positions, in particular assembly positions, positioning drives being shown interrupted for the sake of clarity;
• 6th a schematic representation of a printing unit with a plurality of nozzle bars, the print heads of which are arranged partly in rest positions, in particular maintenance positions and partly in printing positions, positioning drives being shown interrupted for the sake of clarity;
• 7a a schematic representation of a printing unit with a plurality of nozzle bars, the print heads of which are arranged partly in maintenance positions and partly in assembly positions, positioning drives being shown interrupted for the sake of clarity;
• 7b a schematic representation of a printing unit with a plurality of nozzle bars, positioning drives being shown interrupted for the sake of clarity;
• 7c a schematic representation of a printing unit with a plurality of nozzle bars, positioning drives being shown interrupted for the sake of clarity;
• 8a a schematic representation of a supply system for coating agents;
• 8b a schematic representation of an alternative supply system for coating agents;
• 9a a schematic representation of a printing unit with four positioning devices and four maintenance devices, with print heads being arranged in printing positions by means of the two right positioning devices and printing heads being arranged in rest positions, for example as assembly positions, by means of the two positioning devices on the right, and the maintenance devices being in parking positions and with normal supplies and return storage are shown only partially and by way of example;
• 9b a schematic representation of a printing unit according to 9a , wherein by means of the two right positioning devices print heads are arranged in printing positions and by means of the two left positioning devices print heads are arranged in maintenance positions and the two left maintenance devices are in use positions.

A printing press 01 has at least one source of printing material 100 , at least a first printing unit 200 , preferably at least a first dryer 301 , preferably at least one second printing unit 400 and preferably at least a second dryer 331 and preferably at least one post-processing device 500 on. The printing press 01 is also preferred as an inkjet printing machine 01 educated. The printing press is preferred 01 as a web printing machine 01 designed, more preferably as a roll inkjet printing machine 01 . The printing press 01 is for example as a rotary printing press 01 designed, for example as a web-fed rotary printing press 01 , especially web-fed rotary inkjet printing machine 01 . In the case of a web press 01 is the substrate source 100 as a roll unwinding device 100 educated. In the case of a sheet-fed printing press or a sheet-fed rotary printing machine, the printing material is the source 100 designed as a sheet feeder. In the substrate source 100 is preferred at least one Substrate 02 aligned, preferably with respect to at least one edge of this printing material 02 . In the roll dispenser 100 a web printing machine 01 is at least one web-like printing material 02 , i.e. a substrate web 02 , for example a paper web 02 or a textile web 02 or a slide 02 , for example a plastic film 02 or a metal foil 02 from a substrate roll 101 unwound and preferably with respect to their edges in an axial direction A. aligned. The axial direction A. is preferably one direction A. that are parallel to an axis of rotation 111 a substrate roll 101 and / or at least one printing substrate guide element 201 ; 401 , for example at least one central cylinder 201 ; 401 extends. A transport route for the at least one printing material 02 and in particular the substrate web 02 runs after the at least one printing material source 100 preferably by the at least one first printing unit 200 where the substrate 02 and in particular the substrate web 02 preferably by means of at least one printing ink on at least one side and preferably in connection with the at least one second printing unit 400 is preferably provided with a print image on both sides.

After passing the at least one first printing unit 200 runs through the transport route of the printing material 02 and in particular the substrate web 02 preferably the at least one first dryer 301 to dry the applied ink. In the foregoing and in the following, printing ink is generally understood to mean a coating agent, in particular also a lacquer. In particular, a distinction should not be made between printing ink and an ink, but rather printing ink and coating agent should also be understood to mean, in particular, ink. The at least one first dryer is preferred 301 Part of a dryer unit 300 . After passing through the at least one first dryer 301 and preferably the at least one second printing unit 400 and / or the at least one second dryer 331 becomes the substrate 02 and in particular the substrate web 02 preferably the at least one post-processing device 500 supplied and processed further there. The at least one post-processing device 500 is for example as at least one folding device 500 and / or as a winder 500 and / or as at least a plan display 500 educated. In the at least one folding device 500 is the preferred substrate that is printed on both sides 02 preferably processed into individual printed products.

It is preferred along the transport path of the printing material 02 and in particular the substrate web 02 through the printing press 01 after the at least one first printing unit 200 preferably at least the first dryer 301 and / or after the at least one first dryer 301 preferably at least the second printing unit 400 and / or after the at least one second printing unit 400 preferably the at least one second dryer 331 and / or after the at least one second dryer 331 preferably the at least one post-processing device 500 arranged. This ensures that the printing material is printed on both sides 02 and in particular the substrate web 02 is made possible in high quality.

The following is a web press 01 described in more detail. Corresponding details can also be applied to other printing machines 01 , for example sheet-fed printing machines, provided that they do not contradict this. Printing material rolls 101 that is preferred in the roll unwinding device 100 are used, each preferably have a sleeve on which the web-shaped printing material 02 for use in web printing machines 01 is wound up. The substrate web 02 preferably has a width of 700 mm to 2000 mm, but can also have an arbitrarily smaller or preferably larger width. In the roll dispenser 100 is at least one substrate roll 101 arranged rotatably. In a preferred embodiment, the roll unwinding device is 100 for holding a roll of printing material 101 suitably designed, so it has only one storage position for one roll of printing material 101 on. In another embodiment, the roll unwinding device is 100 as a roll changer 100 formed and has storage positions for at least two printing material rolls 101 on. The roll changer is preferred 100 designed in such a way that it enables a flying roll change, that is, a connection of a first printing substrate web 02 a currently processed printing material roll 101 with a second substrate web 02 a subsequent roll of printing material to be processed 101 , while both the currently processed substrate roll 101 , as well as the subsequently processed substrate roll 101 rotate.

A working width of the printing machine 01 is a dimension that is preferably orthogonal to the intended transport path of the printing material 02 by the at least one first printing unit 200 extends, more preferably in the axial direction A. . The working width of the printing machine 01 preferably corresponds to a maximum width that a printing material may have in order to still be able to use the printing press 01 to be processed, so a maximum with the printing machine 01 processable substrate width.

The roll unwinding device 100 preferably has at least one roll holding device for each storage position 103 on, for example, as a jig 103 and / or as a clamping device 103 is trained. The at least one roll holding device is preferably provided 103 at least one first motor-driven rotary body 103 represents. The at least one roll holding device 103 serves a rotatable fastening of at least one printing material roll 101 . The at least one roll holding device 103 preferably has at least one drive motor 104 on.

The roll unwinding device preferably has 100 along the transport path of the substrate web 02 after the roll holder 103 one preferably on a dancer lever 121 deflectably arranged dancer roller 113 and / or a first web edge aligner 114 and / or one, one of a pull roller 118 and a pull press 117 formed feed gap 119 and one as the first measuring roller 141 , especially feed measuring roller 141 trained first measuring device 141 having intake mechanism 139 on. This pull roller 118 preferably has its own, as a traction drive motor 146 trained drive motor 146 on, which is preferably connected to a machine control. The pull roller 118 preferably provides at least a second motor-driven rotary body 118 by means of the dancer roller 113 a web tension is adjustable and can be maintained within limits and / or the web tension is preferably kept within limits. If necessary, the roll unwinding device 100 a gluing and cutting device, by means of which a roll change on the fly, ie without the web of printing material coming to a standstill 02 can take place.

The first web edge aligner 114 in the following, the feed mechanism is preferred 139 arranged. As part of the intake system 139 is preferably the at least the pull roller 118 arranged, with which the pull presser is preferred 117 together the feed gap 119 is arranged forming. The feed slot 119 is used to regulate a web tension and / or a transport of the printing material 02 . It is preferred to use the at least one first measuring roller 141 trained first measuring device 141 the web tension measurable. At least one as the first measuring roller 141 trained first measuring device 141 is in the transport direction of the substrate web 02 preferably in front of the intake gap 119 arranged.

A first printing unit 200 is the roll unwinding device 100 regarding the transport route of the printing material 02 subordinate. The first printing unit 200 has at least one printing substrate guide element 201 on. This is preferably at least one printing material guide element 201 as at least a first central printing cylinder 201 or short central cylinder 201 educated. If in the following from a central cylinder 201 the question is, there is always a central printing cylinder 201 meant. The at least one first central cylinder 201 preferably provides at least a third motor-driven rotary body 201 represents. The substrate web 02 wraps around the first central cylinder during printing 201 at least partially. An angle of wrap is preferably at least 180 ° and more preferably at least 270 °. The wrap angle is the angle measured in the circumferential direction of a cylinder jacket surface of the first central cylinder 201 along which the substrate 02 and in particular the substrate web 02 with the first central cylinder 201 is in contact. Accordingly, viewed in the circumferential direction, at least 50% and more preferably at least 75% of the cylinder jacket surface of the first central cylinder are accordingly in the printing operation 201 with the substrate web 02 in contact. This means that one, as a contact surface between the at least one first central cylinder 201 and preferably as a substrate web 02 trained printing material 02 provided partial surface of a cylinder jacket surface of the at least one first central cylinder 201 the wrap angle around the at least one first central cylinder 201 which is preferably at least 180 ° and more preferably at least 270 °.

Along the transport path of the substrate web 02 in front of the first central cylinder 201 the first printing unit 200 is preferably at least one, preferably as a second measuring roller 216 trained second measuring device 216 arranged to measure the web tension. Along the transport path of the substrate web 02 in front of the first central cylinder 201 the first printing unit 200 is preferably at least one first printing material preparation device 202 or web preparation device 202 onto the substrate web 02 acting and / or on the intended transport path of the printing substrate web 02 aligned. The first substrate preparation device 202 is at least a first side and preferably both sides of the printing substrate web 02 assigned and in particular at least on this first side of the printing substrate web 02 and preferably on both sides of the substrate web 02 effective and / or effective aligned. The printing substrate web is preferred along the transport path 02 between the first web edge aligner 114 and the at least one first central cylinder 201 the one from the draw roller 118 and the pull press 117 formed feed gap 119 arranged.

The at least one first printing material preparation device 202 is in a preferred embodiment along the transport path of the printing substrate web 02 after the feed gap 119 and in front of the first central cylinder 201 onto the substrate web 02 acting and / or on the transport path of the substrate web 02 aligned. The at least one first printing material preparation device is preferred 202 than at least one Substrate cleaning device 202 or web cleaning device 202 educated. As an alternative or in addition, there is at least one printing material preparation device 202 as at least one coating device 202 specially designed for water-based coating agents. Such a coating is used, for example, as a primer. As an alternative or in addition, there is at least one printing material preparation device 202 as at least one corona device 202 and / or discharge device 202 for corona treatment of the printing material 02 educated.

One is preferred as the first deflecting roller 203 trained roller 203 the first printing unit 200 parallel to the first central cylinder with respect to its axis of rotation 201 arranged. This first pulley 203 is preferred from the first central cylinder 201 spaced apart. In particular, there is preferably a first intermediate space 204 between the first deflection roller 203 and the first central cylinder 201 , which is greater than a thickness of the substrate web 02 . Under the thickness of the substrate web 02 is the smallest dimension of the substrate web 02 to understand. The substrate web 02 preferably wraps around part of the first deflecting roller 203 and is deflected by this in such a way that the transport path of the printing substrate web 02 in the first gap 204 both tangential to the first deflection roller 203 as well as tangential to the first central cylinder 201 runs. A lateral surface of the deflection roller 203 preferably consists of a comparatively inelastic material, more preferably a metal, even more preferably steel or aluminum.

At least one, as the first impression roller, is preferred 206 trained first cylinder 206 in the first printing unit 200 arranged. The first impression roller 206 preferably has a lateral surface which consists of an elastic material, for example an elastomer. The first impression roller 206 is preferably by means of an adjusting drive on the first central cylinder 201 adjustable and / or arranged adjustable from this. In one of the first central cylinder 201 the first impression roller is in the engaged state 206 preferably together with the first central cylinder 201 a first impression gap 209 . The substrate web 02 preferably passes through the first impression roller gap during printing 209 . Through the first deflection roller 203 and / or preferably by the first impression roller 206 becomes the substrate web 02 preferably flat and more preferably in a clear and known position on the first central cylinder 201 created. Preferably apart from at most the first impression roller 206 and / or optionally further impression rollers, no further rotary body, in particular no further roller and no further cylinder with the at least one first central cylinder 201 in contact. The axis of rotation of the first impression roller is preferred 206 below the axis of rotation 207 of the first central cylinder 201 arranged.

The first central cylinder 201 preferably has its own, the first central cylinder 201 associated first drive motor 208 on, which is preferred as an electric motor 208 is designed and which is more preferably as a direct drive 208 and / or single drive 208 of the first central cylinder 201 is trained. Under a direct drive 208 is a drive motor 208 to understand the without the interposition of further with the printing material 02 rotating body in contact with the at least one first central cylinder 201 is in torque transmitting and / or transmitting connection. Under a single drive 208 is a drive motor 208 to understand who as the driving motor 208 excluding the at least one first central cylinder 201 is trained. The first drive motor 208 of the first central cylinder 201 preferably has at least one permanent magnet, which is more preferably part of a rotor of the first drive motor 208 of the first central cylinder 201 is.

On the first drive motor 208 of the first central cylinder 201 and / or on the first central cylinder 201 a first angle-of-rotation sensor is preferably arranged itself, which shows a position of the angle of rotation of the first drive motor 208 and / or the first central cylinder 201 self-measuring and / or capable of measuring and is designed to be able to transmit and / or transmit to a higher-level machine control. The first angle of rotation sensor is designed, for example, as a rotary encoder or an absolute value encoder. A rotational position of the first drive motor is provided with such a rotational angle sensor 208 and / or preferably a rotational position of the first central cylinder 201 preferably absolutely determinable by means of the higher-level machine control. In addition or as an alternative, there is the first drive motor 208 of the first central cylinder 201 In terms of circuitry, connected to the machine control in such a way that the machine control is sent to the first drive motor on the basis of the machine control 208 of the first central cylinder 201 predetermined target data for a rotational position of the first drive motor 208 at any time via the rotary position of the first drive motor 208 and thus at the same time the rotary position of the first central cylinder 201 is informed. In particular, the rotational angle position or rotational position of the first central cylinder is preferred 201 and / or the first drive motor 201 Specifying area of the machine control directly, in particular without an interposed sensor, with at least one print head 212 the first printing unit 200 connected to the controlling area of the machine control system.

Within the first printing unit 200 is at least a first printing unit 211 arranged. That at least a first printing unit 211 is preferably in the direction of rotation of the first central cylinder 201 and thus along the transport path of the substrate web 02 after the first impression roller 206 preferably on the at least one first central cylinder 201 arranged acting and / or acting and / or aligned and / or alignable. At least a first printing unit 211 is as a first inkjet printer 211 trained and is also the first ink-jet printing unit 211 called. The first printing unit 211 preferably has at least one nozzle bar 213 and preferably several, in particular four, nozzle bars 213 on. At least a first printing unit 211 and thus the at least one first printing unit 200 preferably has the at least one first print head 212 on that as an inkjet printhead 212 is trained. The at least one nozzle bar preferably has 213 at least one printhead each 212 and preferably multiple printheads each 212 on. Any printhead 212 preferably has a plurality of nozzles from which ink droplets are ejected and / or can be ejected. A nozzle bar 213 is a component that is preferably at least 80% and more preferably at least 100% of the working width of the printing machine 01 extends and as a carrier of the at least one print head 212 serves. An axial length of the barrel of the at least one first central cylinder is preferred 201 at least as large as the working width of the printing machine 01 . There is one or more nozzle bars 213 per printing unit 211 arranged. Each nozzle is preferably a clearly defined target area on the direction A. the width of the substrate web 02 and preferred to the direction A. especially the axis of rotation 207 of the at least one first central cylinder 201 related assigned. Each target area of a nozzle is preferred, in particular in relation to the circumferential direction of the at least one first central cylinder 201 at least clearly defined in the printing company. In particular, a target area of a nozzle is that, in particular, essentially straight spatial area which extends from this nozzle in an ejection direction of this nozzle.

The at least one first nozzle bar 213 preferably extends orthogonally to the transport path of the printing material 02 across the working width of the printing machine 01 . The at least one nozzle bar 213 preferably has at least one row of nozzles. The at least one row of nozzles faces in the axial direction A. viewed preferably over the entire working width of the printing machine 01 and / or width of the barrel of the at least one first central cylinder 201 nozzle openings at regular intervals. In one embodiment, this is a single continuous printhead 212 arranged in the axial direction A. across the entire working width of the printing machine 01 and / or the entire width of the barrel of the at least one first central cylinder 201 extends. In this case, the at least one row of nozzles is preferably at least one linear, extending over the entire width of the web of printing material 02 in the axial direction A. extending juxtaposition of individual nozzles. In another preferred embodiment they are in the axial direction A. several printheads next to each other 212 on the at least one nozzle bar 213 arranged. Since usually such individual printheads 212 are not provided with nozzles up to one edge of their housing, preferably at least two and more preferably exactly two are in the axial direction A. extending rows of printheads 212 in the circumferential direction of the first central cylinder 201 arranged offset to one another, preferably so that in the axial direction A. consecutive printheads 212 preferably one of the at least two rows of print heads alternately 212 belong, preferably always alternating between a first and a second of two rows of print heads 212 . Two such rows of printheads 212 form a double row of printheads 212 . The at least one row of nozzles is preferably not designed as a single linear row of nozzles, but results from the sum of several individual, more preferably two, rows of nozzles arranged offset from one another in the circumferential direction.

Assigns a printhead 212 If there are several nozzles, then all of the target areas of the nozzles of this printhead form 212 together a working area of this printhead 212 . Working areas of printheads 212 of a nozzle bar 213 and in particular a double row of printheads 212 limit in the axial direction A. viewed on each other and / or overlap in the axial direction A. seen. This is also the case with in the axial direction A. discontinuous printhead 212 ensured that in the axial direction A. target areas of nozzles of the at least one nozzle bar viewed at regular and preferably periodic intervals 213 and / or in particular each double row of printheads 212 lie. In any case, an entire working area of the at least one nozzle bar extends 213 preferably over at least 90% and more preferably 100% of the working width of the printing machine 01 and / or the entire width of the barrel of the at least one first central cylinder 201 in the axial direction A. . On one or both sides with respect to the axial direction A. can be a narrow area of the substrate web 02 and / or the ball of the first central cylinder 201 be present that is not in the working area of the nozzle bar 213 listened to. An entire working area of the at least one nozzle bar 213 is preferred from all work areas of printheads 212 this at least one nozzle bar 213 and is preferably composed of all target areas of nozzles of these printheads 212 this at least one Nozzle bar 213 composed. An entire working area preferably corresponds to a double row of print heads 212 in the axial direction A. seen the working area of the at least one nozzle bar 213 .

The at least one nozzle bar preferably has 213 in the circumferential direction with respect to the at least one first central cylinder 201 several rows of nozzles. Each printhead preferably has 212 a plurality of nozzles, which are more preferably in a matrix of several rows in the axial direction A. and / or a plurality of columns, preferably in the circumferential direction of the at least one first central cylinder 201 are arranged, wherein such columns are further preferably arranged to run obliquely to the circumferential direction, for example to increase a resolution of a print image. Preferred are in a direction orthogonal to the axial direction A. , especially in the transport direction along the transport path of the printing material 02 and / or in the circumferential direction based on the at least one central cylinder 201 multiple rows of printheads 212 , more preferably four double rows and even more preferably eight double rows of print heads 212 arranged one after the other. Further preferred are at least in the printing operation in the circumferential direction with respect to the at least one first central cylinder 201 multiple rows of printheads 212 , more preferably four double rows and even more preferably eight double rows of print heads 212 one after the other on the at least one first central cylinder 201 aligned.

Here are the printheads 212 at least in the printing operation preferably aligned such that the nozzles of each print head 212 essentially in the radial direction onto the cylinder jacket surface of the at least one first central cylinder 201 point. Deviations from radial directions within a tolerance range of preferably not more than 10 ° and more preferably not more than 5 ° should be considered to be essentially radial directions. This means that the at least one on the lateral surface of the at least one first central cylinder 201 aligned printhead 212 with respect to the axis of rotation 207 of the at least one first central cylinder 201 in a radial direction onto the lateral surface of the at least one first central cylinder 201 is aligned. This radial direction is one on the axis of rotation 207 of the at least one first central cylinder 201 related radial direction. Each double row of printheads 212 a printing color is preferably assigned and / or assignable to a specific color, for example one of the colors black, cyan, yellow and magenta or a lacquer, for example a clear lacquer. The corresponding inkjet printer 211 is preferred as a four-color printing unit 211 formed and enables a one-sided four-color printing of the substrate web 02 . It is also possible to have fewer or more different colors with one printing unit 211 to print, for example additional special colors. Correspondingly more or fewer print heads are then preferred 212 and / or double rows of printheads 212 within this corresponding printing unit 211 arranged. In one embodiment, at least in the printing mode, there are multiple rows of printheads 212 , more preferably four double rows and even more preferably eight double rows of print heads 212 arranged one after the other aligned on at least one surface of at least one transfer body, for example at least one transfer cylinder and / or at least one transfer belt.

The at least one printhead 212 works to generate ink droplets preferably according to the drop-on-demand process, in which ink droplets are specifically generated when required. Preferably, at least one piezo element is used per nozzle, which, when a voltage is applied, can reduce a volume filled with printing ink by a certain proportion at high speed. As a result, printing ink is displaced, which is ejected through a nozzle connected to the volume filled with printing ink and forms at least one ink drop. By applying different voltages to the piezo element, the adjustment path of the piezo element and thus the reduction in volume and thus the size of the ink droplets are influenced. In this way, color gradations can be implemented in the resulting print image without changing the number of drops that contribute to the print image (amplitude modulation). It is also possible to use at least one heating element per nozzle which generates a gas bubble in a volume filled with printing ink at high speed by evaporating printing ink. The additional volume of the gas bubble displaces printing ink, which in turn is ejected through the corresponding nozzle and forms at least one ink droplet.

With the drop-on-demand method, it is not necessary to deflect the droplets after they have been ejected from the corresponding nozzle, since it is possible to find a target position for the respective ink droplet on the moving printing substrate web 02 with respect to the circumferential direction of the at least one first central cylinder 201 solely through an emission time of the respective ink drop and a rotation speed of the first central cylinder 201 and / or by the rotational position of the first central cylinder 201 to be determined. By controlling each nozzle individually, drops of printing ink are produced from the at least one print head only at selected times and at selected locations 212 onto the substrate web 02 transfer. This takes place as a function of the speed of rotation and / or the angular position of the at least one first central cylinder 201 , a distance between the respective nozzle and the substrate web 02 as well as the position of the target area of the respective nozzle with respect to the circumferential angle. This results in a desired print image that is designed as a function of the activation of all nozzles. An ejection of ink droplets from the at least one nozzle of the at least one printhead 212 preferably takes place as a function of the rotational position of the first drive motor specified by the machine control system 208 . The machine controls are sent to the first drive motor 208 predetermined target data of the rotary position of the first drive motor 208 preferably in real time in a calculation of data for controlling the nozzles of the at least one print head 212 included. A comparison with actual data of the rotary position of the first drive motor 208 is preferably not necessary and preferably does not take place. An exact and constant position of the substrate web 02 relative to the at least one first central cylinder 201 is therefore of great importance for a print image that is in register and / or in register.

The nozzles of the at least one print head 212 are arranged in such a way that a distance between the nozzles and the one on the cylinder jacket surface of the at least one first central cylinder 201 arranged printing substrate web 02 at least when the print head is arranged in a printing position 212 is preferably between 0.5 mm and 5 mm and more preferably between 1 mm and 1.5 mm. The high angular resolution and / or the high sampling frequency of the angle of rotation sensor and / or the high accuracy of the predetermined by the machine control and by the first drive motor 208 of the first central cylinder 201 processed target data for the rotational position of the first drive motor 208 of the first central cylinder 201 enables a very precise determination of the position and / or knowledge of the position of the printing substrate web 02 relative to the nozzles and their target areas. A drop flight time between the nozzles and the substrate web 02 is for example through a learning process and / or through the known distance between the nozzles and the substrate web 02 and a known drop velocity is known. From the angular position of the at least one first central cylinder 201 and / or the first drive 208 of the at least one first central cylinder 201 , the speed of rotation of the at least one first central cylinder 201 and the time of flight of the drops, an ideal point in time for ejecting a respective drop is determined, so that images of the web of printing material in accordance with register and / or register 02 is achieved.

At least one sensor embodied as a first print image sensor is preferably arranged, more preferably at a point along the transport path of the printing material web 02 after the first printing unit 211 . The at least one first print image sensor is designed, for example, as a first line camera or as a first area camera. The at least one first print image sensor is designed, for example, as at least one CCD sensor and / or as at least one CMOS sensor. By means of this at least one first print image sensor and a corresponding evaluation unit, for example the higher-level machine control, control of all of the at least one first central cylinder in the circumferential direction is preferred 201 one behind the other and / or acting print heads 212 and / or double rows of printheads 212 of the first printing unit 211 monitored and regulated. In a first embodiment of the at least one print image sensor, only a first print image sensor is arranged, the sensor field of which covers the entire width of the transport path of the printing substrate web 02 includes. In a second embodiment of the at least one pressure image sensor, only a first pressure image sensor is arranged, which is in the direction A. orthogonal to the direction of the transport path of the printing substrate web 02 is designed to be movable. In a third embodiment of the at least one print image sensor, a plurality of print image sensors are arranged, the respective sensor fields of which each have different areas of the transport path of the printing substrate web 02 include. These areas are preferred in the direction A. orthogonal to the direction of the transport path of the printing substrate web 02 arranged offset to one another. A total of the sensor fields of the plurality of print image sensors preferably comprises an entire width of the transport path of the printing substrate web 02 .

A layer of pixels that are formed by ink droplets that are generated from a respective first print head 212 originate, is preferably compared with a position of image points that are formed by printing ink droplets, which each come from a second, in the circumferential direction of the at least one first central cylinder 201 after the first printhead 212 lying printhead 212 come. This is preferably done regardless of whether these are each first and second in the circumferential direction of the at least one first central cylinder 201 one behind the other and / or acting print heads 212 process the same or a different printing color. There is a coordination of the positions of the different print heads 212 originating print images monitored. If the printing inks are the same, the merging of partial images in register is monitored. If the printing inks are different, a register or color register is monitored. It is preferred to use the measured values of the at least A print image sensor also performs a quality control of the print image.

In a regular printing operation, all print heads are 212 fixed in place. This ensures that all nozzles are permanently aligned and / or correctly aligned. Different situations are conceivable in which a movement of the printheads 212 necessary is. A first such situation is a flying roll change or, in general, a roll change with a gluing process 02 by means of an adhesive strip with another substrate web 02 connected. This results in a connection area that covers the entire transport path of the printing substrate web 02 must go through. This connection area has a thickness, that is to say a smallest dimension, which is greater than a thickness of the web of printing material 02 . The connection area is essentially as thick as two webs of printing material 02 and the tape together. This can cause difficulties when the connection area is the space between the nozzles of the print heads 212 and the cylinder jacket surface of the at least one first central cylinder 201 happens. The at least one nozzle bar 213 is therefore in at least one adjusting direction and / or along at least one adjusting path relative to the axis of rotation 207 of the at least one first central cylinder 201 moveable. In this way, the distance can be increased sufficiently, but must then be reduced again accordingly. A second such situation arises, for example, during maintenance and / or cleaning of at least one of the print heads 212 . The printheads 212 are preferably individually on the at least one nozzle bar 213 attached and individually from the at least one nozzle bar 213 solvable. This allows individual printheads 212 serviced and / or cleaned and / or replaced.

Are several nozzle bars that can be moved towards one another 213 arranged, so can at a return at least one nozzle bar 213 Minimal misalignments of the nozzle bars in a printing position 213 occur among each other. A need for alignment can therefore arise, especially for all print heads 212 of a nozzle bar 213 to printheads 212 other nozzle bar 213 . Becomes a new and / or rearranged printhead 212 on the at least one nozzle bar 213 attached to which at least one other printhead 212 is attached, an exactly matching alignment of this new and / or rearranged print head does not necessarily result, but at most randomly 212 to the at least one printhead already attached 212 namely in the circumferential direction and / or in the axial direction A. with respect to the at least one first central cylinder 201 . Here, too, there may be a need for alignment, in particular for an individual print head 212 to other printheads 212 of the same nozzle bar 213 and / or other nozzle bars 213 .

At least one sensor preferably detects a position of the target area of at least one newly and / or re-arranged print head 212 relative to a position of the target area of at least one printhead that has already been attached 212 . An installation position of the at least one newly and / or re-arranged print head 212 in the circumferential direction with respect to the at least one first central cylinder 201 can be controlled by controlling the nozzles of this printhead 212 compensate, preferably analogous to the adjustment of print heads already described 212 different double rows of printheads 212 . An installation position of the at least one newly and / or re-arranged print head 212 in the axial direction A. with respect to the at least one first central cylinder 201 is compensated by means of at least one adjustment mechanism. Preferably have several print heads 212 each has its own adjustment mechanism; more preferably, all of them have print heads 212 each has its own adjustment mechanism.

The printing press 01 has at least one supply system 251 for coating agents, in particular at least one printing ink supply system 251 on. Preferably have several print heads 212 , for example multiple printheads 212 of a common nozzle bar 213 , in particular several or more preferably all print heads 212 a double row of printheads each 212 a common supply system 251 for coating agents. At least one supply system 251 and in particular the common pension system 251 for coating agents preferably has at least one normal supply 252 on, in particular at least a normal supply 252 for coating agents. With at least one normal supply 252 at least one is preferred as a color line 253 trained liquid line 253 per printhead 212 connected. In particular, each of at least two print heads is preferred 212 each via at least one first liquid line 253 preferably directly with the at least one normal supply 252 connected and / or arranged to be connectable. The respective first liquid line 253 can for example be a flexible line, in particular at least one hose. The at least one normal supply is preferred 252 via at least one feed line 254 and at least one derivative 256 directly or via intermediate components 263 ; 280 ; 285 ; 295 such as at least a second shut-off valve 263 and / or at least one return memory 295 and / or at least one return pump 285 and / or at least one return valve 280 with at least one and preferably at least one identical buffer store 257 especially temporary storage 257 for at least one Coating means connected and / or arranged so as to be connectable. An expansion of an interior space of the at least one normal supply is preferred 252 in the axial direction A. at least as large as 50% that in the axial direction A. measured width of the working area of the at least two printheads 212 having nozzle bar 213 and / or at least 50% of the through the maximum with the printing machine 01 processable printing material width specified working width of the printing machine 01 .

The at least one printing unit preferably has 200 ; 400 several normal stocks 252 on, more preferably at least one normal supply 252 per printing ink to be printed, for example four normal supplies 252 . This is particularly preferably the case when printing heads 212 , which are assigned to different printing inks, are aligned at different angles to a vertical, since in this case different heights of liquid columns for relevant hydrostatic pressures result. This is particularly preferred when printing heads 212 ; 412 for example by means of appropriate positioning devices 217 ; 218 ; 219 ; 221 are arranged movable relative to one another, for example in different positions such as printing positions and / or rest positions. Two normal stocks are therefore more preferred 252 per double row of printheads 212 ; 412 arranged, so in particular four normal stocks 252 per coating agent. The printing unit preferably has 200 ; 400 one return memory each 295 per nozzle beacon 213 and / or per positioning device 217 ; 218 ; 219 ; 221 on, at least indirectly, with four normal stocks each 252 connected is.

The normal supply 252 preferably at least in a printing operation and more preferably permanently has a filling level that is constant except for deviations within a narrow tolerance range. This constant fill level is due, for example, to an inflow of printing ink and an overflow outflow 258 realizable. Under an overflow drain 258 an outflow is to be understood here, which has a maximum height of a fill level, in particular of the normal supply 252 specifies. It is a regulated overflow drain 258 possible, which, for example, has at least one level meter and at least one valve. However, at least one passive overflow drain is preferred 258 arranged. A passive overflow drain 258 is preferably an overflow drain 258 , which essentially consists of an opening, the lower edge of which is arranged at a certain height and which thereby defines a maximum fill level. It preferably has at least one normal supply 252 and / or the at least one derivative 256 at least one preferably passive overflow drain 258 on, the discharge side of which preferably directly or via intermediate components 263 , 280 ; 285 ; 295 with the at least one buffer 257 is arranged connected and / or connectable, more preferably the at least one identical buffer store 257 , with which the at least one normal supply 252 also via the at least one supply line 254 connected and / or arranged to be connectable. It is preferred along the at least one feed line 254 at least one filter device 259 and / or at least one degassing device 261 and / or at least one damping device 299 arranged for damping pulsations. It is preferred within the at least one feed line 254 at least one preferably as the first shut-off valve 262 trained valve 262 arranged and / or is within the at least one derivative 256 at least one, preferably as a second shut-off valve 263 trained valve 263 arranged.

It is preferred in the at least one feed line 254 at least one first liquid pump 264 arranged. It is preferred constant coating agent, in particular printing ink in the normal supply 252 promoted, with excess coating agent through the at least one overflow drain 258 is discharged and a level of the coating agent in the normal supply 252 by an arrangement height of an opening of the overflow drain 258 is fixed. Preference is given to the normal supply 252 a controlled and / or regulated normal pressure, which is more preferably controlled and / or regulated relative to an ambient pressure, in particular atmospheric pressure. The constant height level and the controlled and / or regulated normal pressure ensure that a constant pressure within the coating agent at the nozzle openings of the print heads 212 prevails. Thus there are constant operating conditions for the printheads 212 ensured. It is preferred in at least one first gas space 266 of at least one normal supply 252 at least one gas volume is arranged in which there is a normal pressure that is lower than an ambient pressure that is present on an ejection side of at least one nozzle of the at least one print head 212 prevails. The normal supply is therefore preferably the normal pressure 252 a negative pressure compared to the ambient pressure. This negative pressure is preferably between 4 kPa (four kilopascals), i.e. 40 mbar (forty millibars) and 6 kPa (six kilopascals), i.e. 60 mbar (sixty millibars), more preferably between 4.5 kPa (four and a half kilopascals), i.e. 45 mbar (forty-five millibars) and 5.5 kPa (five and a half kilopascals), i.e. 55 mbar (fifty-five millibars). When setting the pressure, preference is given to an installation position of the print head 212 attention, because its inclined position leads to a different height level and thus to a different hydrostatic pressure, which can be compensated via this pressure. The at least one normal supply preferably extends 252 over at least 50%, further preferably at least 75% and even more preferably at least 90% of a width of the working area of the at least one nozzle bar 213 in the axial direction A. and / or the working width of the printing machine 01 .

It is preferred in the at least one derivation 256 at least one return memory 295 arranged, more preferably at a lower level than the at least one normal supply 252 . Along the at least one derivation 256 especially after the at least one return memory 295 is preferably at least one return pump 285 arranged, for example, around coating agent back into the preferably higher intermediate storage 257 to promote. The at least one buffer store is preferred, but not necessarily 257 arranged higher than the at least one normal supply 252 . Along the at least one derivation 256 before or preferably after the at least one return pump 285 is preferably at least one return valve 280 arranged. In this way it is ensured that there is a circuit of coating agent within which coating agent can be conveyed by means of pumps and gravity.

The at least one first liquid pump is preferred 264 Coating agents, for example printing ink from the buffer 257 in the normal supply 252 pumped. At least one normal supply is preferred in the 252 at least one and preferably exactly one as the first gas space 266 arranged volume. The at least one first gas space 266 is preferably via at least one first gas line 267 with at least one vacuum source 268 ; 276 ; 277 connected and / or connectable arranged. The at least one vacuum source 268 ; 276 , 277 is for example as at least one gas pump and / or at least one vacuum buffer 276 and / or at least one vacuum regulator 277 educated. In the at least one first gas line 267 is preferably at least one liquid trap 293 , especially coating agent trap 293 arranged. There is preferably a second gas space 269 of the cache 257 the same normal pressure as in the at least one first gas space 266 of at least one normal supply 252 . This is for example through a connection of the second gas space 269 by means of at least one second gas line 271 with at least one second gas pump and / or the at least one first gas space 266 and / or the at least one first gas pump 268 and / or the at least one vacuum buffer 276 and / or more preferably the at least one vacuum regulator 277 realized. The at least one second gas line 271 preferably has at least one vacuum sensor 294 on.

At least one return storage tank is preferred in the 295 at least a third gas compartment 290 intended. The third gas space preferably prevails 290 of the return memory 295 the same normal pressure as in the at least one first gas space 266 of at least one normal supply 252 , at least as long as there is at least one first valve 262 and the at least one second valve 263 are closed. This is for example through a connection of the third gas space 290 by means of at least one compensating line 286 with the at least one second gas pump and / or the at least one first gas space 266 and / or the at least one first gas pump 268 and / or the at least one vacuum buffer 276 and / or more preferably the at least one vacuum regulator 277 realized. The at least one compensation line 286 preferably has at least one liquid trap 293 , especially coating agent trap 293 on.

The at least one liquid trap 293 , for example coating agent trap 293 is designed, for example, as at least one cavity which has an inlet and an outlet. The entrance is preferably at a distance above a lowest point of the cavity. The exit is preferably at the same level as the entrance or higher. A cross section of the cavity is preferably larger than a cross section of a line connected to the inlet. Vacuum is preferably applied at the exit, which draws gas through the entrance and through the cavity. If liquid is also sucked in, it settles down at the lowest point of the cavity due to gravity and is not conveyed into the vacuum line connected to the outlet. By means of a sensor and / or manually, for example optically, it can be checked whether there is liquid at the lowest point of the cavity and must be removed. Removal can take place manually or automatically by means of an outlet that can be closed and / or is connected to a pump, for example at the lowest point of the cavity.

At least one vacuum pump is preferred 268 arranged with the at least one vacuum line 278 the at least one vacuum buffer 276 connected is. The at least one vacuum buffer 276 is preferably via at least one degassing line 279 with the at least one degassing device 261 connected and / or arranged to be connectable. The at least one vacuum buffer 276 is preferably via at least one vacuum line 281 with at least one vacuum regulator 277 connected and / or arranged to be connectable, preferably via at least one supply air filter 292 is connected and / or connectable to an environment. At least a normal pressure line 282 preferably connects the at least one vacuum regulator 277 with at least one pressure regulator 283 . The vacuum regulator 277 is preferably used to reduce the pressure in the at least one normal pressure line 282 set to normal pressure, in particular by admixing, for example, ambient air under atmospheric pressure to that from the vacuum buffer 276 originating air. The at least one pressure regulator 283 is preferred with at least one source of compressed air 284 , for example at least one air pump 284 or with an atmospheric compound 284 connected arranged. The at least one pressure regulator is preferred 283 via the at least one first gas line 267 with the at least one first gas space 266 of at least one normal supply 252 connected and / or arranged to be connectable. This allows using the pressure regulator 283 either normal pressure or overpressure in the first gas line 267 and thus in the first gas space 266 of normal supply 252 be generated. Any gas volumes that occur, which are enclosed when the system is filled with coating agent, are preferred by means of respective compensating lines 286 can be pumped off and / or can at least be subjected to the respective normal pressure. Such gas volumes can, for example, in an area of the at least one shut-off valve 263 and / or in particular in the area of the at least one return storage tank 295 appear.

The at least one buffer store is preferred 257 with at least one buffer storage 272 connected, more preferably via at least one supply line 273 . In an exemplary first embodiment of the supply line 273 is the at least one buffer 257 via at least one suction line 273 trained supply line 273 with the at least one buffer memory 272 connected. Then, for example, along the at least one suction line 273 no liquid pump or no pump at all between the at least one buffer store 272 and the at least one buffer 257 arranged and / or prevails in the buffer memory 272 Ambient pressure and / or is between the buffer tank 272 and the buffer 257 no pump is arranged, but printing ink is drawn from the buffer tank by the relative negative pressure 272 into the cache 257 promoted. This allows particularly constant conditions in the intermediate storage 257 and in normal stock 252 ensure, especially with regard to normal pressure. In a preferred exemplary second embodiment of the supply line 273 instructs the supply line 273 at least one supply pump 296 and / or preferably at least one flow measuring device 297 and / or preferably at least one supply valve 298 and / or local supply valve 298 on. For example, a supply line 273 after a supply valve 298 be divided into several sub-lines that connect to different printing units 200 ; 400 connected and designed to be closed independently of one another by means of local supply valves 2968. (In 8b a dashed line indicates such a possibility.)

The buffer storage 272 is for example with a replaceable storage container 274 connected and / or connectable, for example also supplying other print heads 212 and / or other nozzle bars 213 and / or other printing units 200 ; 400 and / or other printing machines 01 can serve. The at least one buffer store is preferred 272 via at least one second supply line 273 , for example suction line 273 with at least one additional buffer 257 connected and / or connectable, the at least one further, for example second printing unit 200 ; 400 the printing press 01 assigned. For example, along at least one supply line 288 between the at least one storage container 274 and the at least one buffer memory 272 at least one storage pump 289 and at least one supply valve 291 arranged. For example, the at least one buffer memory 272 at least one overflow 287 on, via which excess coating agent can flow off in an emergency, for example in the event of a malfunction of the at least one supply pump 289 and / or the at least one supply valve 291 . This in particular prevents the normal pressure from being adversely affected. In an exemplary embodiment, the at least one buffer memory is omitted 272 and is instead of the buffer memory 272 directly to the storage container 274 arranged, in which case, for example, the supply pump 289 omitted and a supply of coating agent by the supply pump 296 is made.

Per printing unit is preferred 200 ; 400 and coating means in each case at least one and more preferably exactly one intermediate store 257 arranged. At least one normal supply is preferred for each printing unit and coating agent 252 and are more preferably exactly four normal supplies 252 arranged. At least one and more preferably exactly one return reservoir is preferred for each printing unit and coating agent 295 arranged. For example, in a four-color machine with two printing units 200 ; 400 eight buffers 257 and thirty-two normal supplies 252 and eight return memories 295 arranged. Per printing unit is preferred 200 ; 400 and more preferably per printing machine 01 exactly one vacuum source 268 arranged. For each coating agent, preference is given to, in particular, printing ink for the entire printing press 01 exactly one storage container 274 and / or exactly one buffer memory 272 arranged.

The at least one buffer store is preferred 257 stationary relative to a frame 231 the respective pressure unit 200 ; 400 . The at least one normal supply is preferred 252 together with the at least one print head 212 ; 412 and / or the at least one nozzle bar 213 ; 413 by means of a corresponding positioning device 217 ; 218 ; 219 ; 221 movably arranged and / or is the at least one return supply 295 together with the at least one print head 212 ; 412 and / or the at least one normal supply 252 and / or the at least one nozzle bar 213 ; 413 by means of a corresponding positioning device 217 ; 218 ; 219 ; 221 movably arranged. This ensures in particular constant conditions of hydrostatic pressures, for example within the at least one normal supply 257 and / or within the at least one print head 212 ; 412 .

The printing press preferably allows 01 a method for cleaning at least one nozzle at least two as inkjet printheads 212 trained print heads 212 the printing press 01 , with the printing press 01 the at least one supply system 251 having the at least one normal supply 252 preferably for the at least one coating agent and the at least one intermediate store 257 preferably for which has at least one coating agent and wherein each of the at least two print heads 212 ; 412 each via at least one first liquid line 253 preferably directly with the at least one normal supply 252 is arranged connected and / or connectable and wherein the at least one normal supply 252 via the at least one supply line 254 and the at least one derivative 256 with the at least one, preferably identical, buffer store 257 is connected and initially each of the at least one supply line 254 preferably by means of the at least one first shut-off valve 262 and each of the at least one derivative 256 preferably by means of the at least one second shut-off valve 263 is closed and in connection with a pressure within the within the at least one normal supply 252 arranged gas volume preferably by means of at least the at least one first gas pump 268 and / or by means of at least the at least one compressed air source 284 is increased and thereby coating agent and in particular printing ink through the at least one nozzle of the at least two print heads 212 promoted and preferentially expelled.

Preferably have several print heads 212 , for example multiple printheads 212 of a common nozzle bar 213 , in particular several or more preferably all print heads 212 a double row of printheads each 212 a common power supply system. Preferably, at least one common power line of the voltage supply extends within the respective at least one nozzle bar over at least 50%, more preferably at least 75% and even more preferably at least 90% of a width of the working area of the respective at least one nozzle bar 213 in the axial direction A. and / or the working width of the printing machine 01 . Each printhead preferably has 212 this respective at least one nozzle bar 213 each has at least its own voltage line, which is connected to this common power line of the voltage supply. Each printhead preferably has 212 this respective at least one nozzle bar 213 each have at least one data line of their own, which is connected to a computing unit, which is related to the axial direction A. outside the working area of the respective at least one nozzle bar 213 and / or with respect to the axial direction A. outside each for printing material 02 intended transport route of the printing machine 01 is arranged. Thus, at least one of them run in the axial direction A. extending portion of the nozzle bar 213 at least one data line per printhead 212 this at least one nozzle bar 213 parallel to each other.

The printing press 01 preferably has at least one printing unit 200 ; 400 on, wherein the at least one printing unit 200 ; 400 at least one, preferably one having an ejection direction, as an inkjet printhead 212 ; 412 trained printhead 212 ; 412 and preferably several, preferably each having an ejection direction, as inkjet printheads 212 ; 412 trained print heads 212 ; 412 and preferably at least one about a respective axis of rotation 207 ; 407 rotatable substrate guide element 201 ; 401 has, by means of which preferably at least one for preferably web-shaped printing material 02 intended transport path is at least partially determined and / or can be determined. The at least one nozzle, and more preferably each nozzle, preferably has one relative to the nozzle and the print head having the nozzle 212 clearly defined discharge direction. Ejection directions from nozzles of a common print head are preferred 212 aligned parallel to each other. The ejection direction of at least one nozzle of the at least one print head is preferred 212 at least when the print head is in a printing position 212 on a lateral surface of the at least one printing substrate guide element 201 ; 401 aligned.

This is preferably at least one printing material guide element 201 ; 401 within the at least one printing unit 200 ; 400 arranged and / or is the at least one printing substrate guide element 201 ; 401 as at least one web guide roller and / or one deflection roller 203 ; 214 ; 312 ; 403 ; 414 and / or as at least one central printing cylinder 201 ; 401 and / or designed as at least one transmission body.

The at least one print head is preferred 212 ; 412 with at least one positioning device 217 ; 218 ; 219 ; 221 connected and / or connectable. The at least one print head is further preferred 212 permanently with the at least one positioning device 217 ; 218 ; 219 ; 221 connected and only for assembly purposes and / or disassembly purposes and / or to replace the at least one print head 212 of the at least one positioning device 217 ; 218 ; 219 ; 221 separable.

The at least one printing unit preferably has 200 ; 400 at least two and more preferably at least four nozzle bars 213 ; 413 on, each at least two printheads 212 ; 412 exhibit. Any nozzle bar is preferred 213 ; 413 with at least one positioning device 217 ; 218 ; 219 ; 221 connected and / or connectable and is in this way at the same time each corresponding print head 212 ; 412 with at least one positioning device 217 ; 218 ; 219 ; 221 connected and / or connectable. The at least two, in particular at least four, nozzle bars are preferred 213 ; 413 by means of a respective positioning device 217 ; 218 ; 219 ; 221 arranged movably along a respective, for example, linear adjustment path. At least one of at least two print heads is preferred 212 further preferably by means of a positioning device assigned to it 217 optionally can be arranged at least either in a printing position assigned to it or in at least one rest position assigned to it. Each of at least four print heads is further preferred 212 ; 412 further preferably by means of a positioning device assigned to it 217 ; 218 ; 219 ; 221 optionally can be arranged at least either in a printing position assigned to it or in at least one rest position assigned to it.

The at least one print head is preferred 212 in particular by means of at least one positioning device 217 ; 218 ; 219 ; 221 can be arranged in at least one printing position. A print head arranged in its printing position is preferred 212 characterized in that at least one nozzle of the at least one print head 212 of a designated transport route for printing material 02 and / or from the printing material 02 and / or from a transfer body and / or from the printing substrate guide element 201 ; 401 has a distance which is at most 5 mm and more preferably at most 1.5 mm and / or which is preferably at least 0.5 mm and more preferably at least 1 mm.

A print head arranged in its printing position is preferred 212 characterized in that a majority of all nozzles of the at least one printhead 212 have a respective ejection direction, that of a surface normal of a surface element closest to the respective nozzle of the intended transport path for printing material 02 and / or from a surface normal of a surface element of the printing material closest to the respective nozzle 02 and / or from a surface normal of a surface element of a transfer body closest to the respective nozzle and / or from a surface normal of a surface element of a printing substrate guide element closest to the respective nozzle 201 ; 401 deviates by at most 10 ° and more preferably by at most 6 ° and even more preferably by at most 3 °.

A print head arranged in its printing position is preferred 212 characterized in that a majority of all nozzles of the at least one printhead 212 have a respective ejection direction which deviates from a vertical direction by at most 30 °. It is preferred at least when the print head is arranged in the printing position 212 an ejection direction of at least one and preferably each nozzle of at least this print head 212 on at least one printing substrate guide element 201 ; 401 and / or at least one transmission body arranged in alignment. It is preferred at least when the print head is arranged in the printing position 212 at least one nozzle of this printhead 212 arranged in a position provided for a printing operation of this at least one nozzle.

The at least one print head is preferred 212 in particular by means of the at least one positioning device 217 ; 218 ; 219 ; 221 can be arranged in at least one rest position and more preferably in at least two different rest positions. The at least one rest position is designed, for example, as at least one maintenance position and / or as at least one assembly position. A maintenance position is preferably a position in which the at least one print head 212 can be serviced, for example cleaned and / or aligned and / or can be stored in a state that is in particular secured against contamination and / or drying out, in particular without the at least one print head 212 from the printing press 01 and / or the at least one printing unit 200 ; 400 refer to. A mounting position is preferably a position in which the at least one print head 212 from the printing press 01 and / or the at least one printing unit 200 ; 400 and / or the at least one nozzle bar 213 removed and / or in the printing machine 01 and / or the at least one printing unit 200 ; 400 and / or the at least one nozzle bar 213 can be used. In particular, more space is preferably available to an operator in the assembly position to access the at least one print head 212 to arrive, while in the maintenance position there is preferably only sufficient space available for internal, in particular automatically running processes within the printing press 01 to be able to perform.

The respective rest positions of the print heads are preferably distinguished 212 regardless of their training as a maintenance position and / or assembly position in that different print heads 212 in their respective rest positions at least partially different distances from the intended transport path for printing material 02 and / or to a printing material 02 and / or to a transfer body and / or to the printing substrate guide element 201 ; 401 , especially central cylinder 201 ; 401 exhibit. Preferably, each nozzle of the at least one print head arranged in its maintenance position has 212 ; 412 from a surface element of the intended transport path for printing material closest to the respective nozzle 02 and / or from a surface element of the printing material closest to the respective nozzle 02 and / or from a surface element of a transfer body closest to the respective nozzle and / or from a printing substrate guide element 201 ; 401 , especially central cylinder 201 ; 401 a distance which is at least 10 cm and more preferably at least 25 cm.

The respective maintenance positions of the print heads are preferably identified 212 characterized in that different printheads arranged in their respective maintenance positions 212 have different distances from one another than in their respective printing positions and / or in their respective mounting positions.

The respective mounting positions of the print heads are preferably identified 212 characterized in that different, arranged in their respective mounting positions print heads 212 have different distances from one another than in their respective printing positions and / or in their respective maintenance positions. Preferably, each nozzle of the at least one print head arranged in its mounting position has 212 ; 412 from a surface element of the intended transport path for printing material closest to the respective nozzle 02 and / or from a surface element of the printing material closest to the respective nozzle 02 and / or from a surface element of a transfer body closest to the respective nozzle and / or from a printing substrate guide element 201 ; 401 , especially central cylinder 201 ; 401 a distance which is at least 20 cm and more preferably at least 35 cm. These distances are preferably measured in the axial projection plane.

In a first possible embodiment, the at least one positioning device has 217 ; 218 , 219 ; 221 at least one as a lever arm 224 trained positioning guide 224 , for example several, in particular four, preferably as lever arms 224 trained positioning guides 224 and, for example, one in each case, preferably as a lever arm 224 trained positioning guide 224 per movable nozzle bar 213 and / or per movable printhead 212 on. For example and in particular if the at least one positioning guide 224 as at least a lever arm 224 is formed, is the travel of the at least one print head 212 ; 412 designed as at least one circular arc. For example, is a pivot axis 227 of the at least one lever arm 224 parallel to the axial direction A. arranged. This ensures that movements of the at least one lever arm 224 and the at least one print head arranged thereon, for example 212 and / or nozzle bar 213 run only in a plane that is defined by a surface normal that is parallel to the axial direction A. is arranged, in particular in the axial plane of projection. For example, have at least two positioning devices 217 ; 218 mutually different pivot axes 227 on. For example, at least two positioning devices additionally or alternatively have a common pivot axis 227 on.

For example, the first possible embodiment of the at least one positioning device is distinguished 217 ; 218 , 219 ; 221 respective maintenance positions of the printheads 212 characterized in that with the print head arranged in its respective maintenance position 212 all nozzles of this printhead 212 Ejection directions which, up to a tolerance range of preferably at most 20 ° and more preferably at most 12 ° and even more preferably at most 8 °, point in a vertical direction, in particular a vertically downward direction. In particular, one direction, which is the arithmetic mean of all ejection directions of all nozzles of the at least one print head arranged in its maintenance position, preferably gives way 212 ; 412 having nozzle bar 213 is set, from the vertical direction by at most 12 °, more preferably at most 8 ° and even more preferably at most 4 °.

For example, the first possible embodiment of the at least one positioning device is distinguished 217 ; 218 , 219 ; 221 respective maintenance positions of the printheads 212 characterized in that nozzles of different printheads arranged in their respective maintenance positions 212 Have ejection directions that are at different angles to a respective closest surface element of the intended transport path for printing material 02 and / or the web guiding element 201 ; 401 and / or the transfer body and / or the printing material 02 are oriented, more preferably this difference being the angle at least 2 °, preferably at least 6 ° and more preferably at least 10 °. A plane in which this angle is measured is preferably defined by a surface normal that is parallel to the axial direction A. lies or from this axial direction A. deviates by a maximum of 2 °. This plane is preferably called the axial projection plane.

For example, the first possible embodiment of the at least one positioning device is distinguished 217 ; 218 , 219 ; 221 respective mounting positions of the printheads 212 characterized in that nozzles of different print heads arranged in their respective mounting positions 212 Have ejection directions that are at different angles to a respective closest surface element of the intended transport path for printing material 02 and / or the web guiding element 201 ; 401 and / or the transfer body and / or the printing material 02 are oriented, more preferably this difference being the angle at least 2 °, preferably at least 6 ° and more preferably at least 10 °. A plane in which this angle is measured is preferably defined by a surface normal that is parallel to the axial direction A. lies or from this axial direction A. deviates by a maximum of 2 °. This plane is also preferably the axial projection plane.

For example, the first possible embodiment of the at least one positioning device is distinguished 217 ; 218 , 219 ; 221 respective mounting positions of the printheads 212 characterized in that with the print head arranged in its respective mounting position 212 all nozzles of this printhead 212 Ejection directions which deviate by preferably at least 4 ° and more preferably at least 6 ° and even more preferably at least 8 ° from a vertical direction, in particular a vertically downward direction. In particular, one direction, which is the arithmetic mean of all ejection directions of all nozzles of the at least one print head arranged in its mounting position, preferably gives way 212 ; 412 having nozzle bar 213 is set, from a vertical direction by at least 4 °, more preferably at least 6 ° and even more preferably at least 8 °.

For example, the first possible embodiment of the at least one positioning device is distinguished 217 ; 218 , 219 ; 221 respective mounting positions of the printheads 212 characterized in that with the print head arranged in its respective mounting position 212 a direction which is the arithmetic mean of all ejection directions of all nozzles of the at least one printhead arranged in its mounting position 212 ; 412 having nozzle bar 213 is set, from a surface normal of a surface element closest to the respective nozzle of the intended transport path for printing material 02 and / or from a surface normal of a surface element of the printing material closest to the respective nozzle 02 and / or from a surface normal of a surface element of a transfer body and / or a printing substrate guide element closest to the respective nozzle 201 ; 401 deviates by at least 20 ° and more preferably by at least 30 °.

For example, the first possible embodiment of the at least one positioning device is distinguished 217 ; 218 , 219 ; 221 at least one mounting position of at least one print head 212 and preferably all printheads 212 characterized in that in the axial projection plane and / or in a plane which is defined by a surface normal that is parallel to the axial direction A. lies or from this axial direction A. deviates by at most 2 °, ejection directions of all nozzles of the printhead arranged in its printing position 212 have a horizontal component which is exactly opposite to a horizontal component, the ejection directions of all nozzles of this printhead arranged in its mounting position 212 exhibit. In particular, this preferably results in the respective print heads 212 can be transferred from their printing position via their maintenance position into their assembly position by at least one pivoting movement.

In a second and preferred embodiment of the at least one positioning device 217 ; 218 , 219 ; 221 has the at least one positioning device 217 ; 218 , 219 ; 221 at least one linear, preferably as a rail 224 trained positioning guide 224 and more preferably several, in particular four, preferably as rails 224 trained positioning guides 224 and even more preferably at least one each, preferably as a rail 224 trained positioning guide 224 per movable nozzle bar 213 and / or per movable printhead 212 on. More preferred are each nozzle bar 213 two as a rail 224 trained positioning guides 224 arranged, in particular one rail each 224 each axial end of the at least one printing substrate guide element 201 ; 401 , so a total of at least eight rails 224 per pressure unit 200 ; 400 . Preferably and especially if the at least one positioning guide 224 than at least a rail 224 is formed, is the travel of the at least one print head 212 ; 412 formed linear.

A printing press is therefore preferred 01 , the at least one printing unit 200 ; 400 having at least two, more preferably at least three and even more preferably at least four print heads 412 , 212 and at least one about an axis of rotation 207 ; 407 rotatable substrate guide element 201 ; 401 having each of the at least two, preferably at least three and more preferably at least four print heads 212 ; 412 by means of a respective, at least this print head 212 ; 412 associated positioning device 217 ; 218 ; 219 ; 221 along of a respective linear travel is movably arranged. More preferably, the linear travel ranges in the respective actuating directions that vary in pairs by at least 10 °, more preferably at least 15 ° and independently of the lower limit by at most 150 °, more preferably at most 120 °, even more preferably at most 90 ° and even further preferably differ at most 60 °. Preferably, all directions of adjustment differ from positioning devices 217 ; 218 ; 219 ; 221 the same printing unit 200 ; 400 in all possible pairwise comparisons by at least 10 °, more preferably at least 15 ° and independently of the lower limit by at most 150 °, more preferably at most 120 °, even more preferably at most 90 ° and even more preferably at most 60 °. Adjustment directions preferably differ from print heads 212 ; 412 , the adjacent positioning devices 217 ; 218 , 219 ; 221 are assigned by at least 10 °, more preferably at least 15 ° and independently of the lower limit by at most 60 °, more preferably at most 45 °, even more preferably at most 30 ° and even more preferably at most 20 °. It is preferably ensured that movements of the at least one print head 212 and / or nozzle bar 213 run only in a plane that is defined by a surface normal that is parallel to the axial direction A. is arranged, in particular in the axial plane of projection.

Each of the at least two, preferably at least three and more preferably at least four print heads is preferred 212 ; 412 by means of the respective positioning device 217 ; 218 ; 219 ; 221 optionally can be arranged at least either in a printing position assigned to it and at least one maintenance position assigned to it, with a first print head in the at least one maintenance position 212 ; 412 of at least two, preferably at least three and more preferably at least four print heads 212 ; 412 at least one maintenance device 222 at least one first nozzle of the at least one first print head 212 ; 412 assigned and / or assignable. That in the foregoing and in the following with regard to the at least one maintenance device 222 What is described applies preferably to every maintenance device 222 , especially in the case of two, three or four maintenance devices per printing unit 200 ; 400 . The at least one maintenance device 222 is preferably arranged movably along at least one supply path between at least one parking position and at least one use position, in particular by means of at least one feed device 223 . If there are several maintenance devices 222 is preferred to any maintenance device 222 its own delivery route, its own parking position and its own deployment position are assigned. A possibly existing component of the respective supply path of the at least one maintenance device 222 in one through the axis of rotation 207 ; 407 of the at least one rotatable printing substrate guide element 201 ; 401 specified axial direction A. is preferably at most 50% of one in the axial direction A. measured width of a working area of the at least one printhead 212 having nozzle bar 213 and / or at most 50% one through a maximum with the printing machine 01 processable printing material width specified working width of the printing machine 01 .

The adjustment directions of the linear adjustment paths are preferably each orthogonal and in particular radial to the axis of rotation 207 ; 407 of the at least one rotatable printing substrate guide element 201 ; 401 aligned. All print heads are preferred 212 ; 412 arranged in their printing positions and their rest positions, in particular maintenance positions and / or assembly positions, in such a way that their respective nozzles always have the same orientation with respect to their ejection direction. The print heads preferably have 212 ; 412 linear travel ranges.

The at least one positioning device 217 ; 218 , 219 ; 221 preferably has at least one positioning drive 226 and more preferably several positioning drives 226 and even more preferably one positioning drive each 226 per movable nozzle bar 213 on. For example, everyone is positioning guide 224 one positioning drive each 226 assigned. The at least one positioning drive 226 is for example as at least one hydraulic cylinder 226 and / or as at least one pneumatic cylinder 226 and / or preferably as at least one electric motor 226 educated. The at least one positioning drive is preferred 226 arranged such that it has the at least one print head 212 can optionally move into its printing position or its maintenance position or its assembly position and more preferably also hold there. The at least one positioning drive is preferred 226 than at least an electric motor 226 , for example as at least one stepper motor 226 formed and / or connected to at least one threaded spindle. The at least one threaded spindle is preferably in engagement with at least one spindle nut, which engages with the respective nozzle bar 213 connected is.

At least four positioning devices are preferred 217 ; 218 ; 219 ; 221 arranged, by means of which in each case at least one nozzle bar 213 and / or in particular a plurality of print heads each assigned to the same printing color 212 are designed to be movable together. In particular, this can be used to provide configurations in which the print heads 212 at least one nozzle bar 213 and / or at least one printing ink are arranged in their printing position, while the print heads 212 at least one other nozzle bar 213 and / or another printing ink are arranged in a rest position, for example a maintenance position. This means, for example, that all print heads 212 one printing color, for example black, while activating all of the printheads 212 other printing inks are held in a maintenance position and are protected from drying out and / or cleaned there, for example by suitable means.

At least one first locking element is preferably arranged, for example at least one pressure stop. The at least one print head is preferably by means of the at least one first locking element 212 can be determined in its printing position, for example by the at least one positioning drive 226 , especially pneumatic cylinders 226 and / or electric motor 226 , the at least one printhead 212 and / or the at least one print head 212 having nozzle bars 213 pulls and / or presses against the at least one pressure stop. This ensures that the printing position is reproducible and precisely defined.

At least one second locking element is preferably arranged, for example at least one assembly stop. The at least one print head is preferably by means of the at least one second locking element 212 fixable in its mounting position, for example by the at least one positioning drive 226 , especially pneumatic cylinders 226 and / or electric motor 226 , the at least one printhead 212 and / or the at least one print head 212 having nozzle bars 213 pulls and / or presses against the at least one assembly stop. This ensures that the mounting position is reproducible and precisely defined.

At least one third locking element is preferably arranged, for example at least one maintenance stop. The at least one print head is preferably used by means of the at least one third locking element 212 fixable in its maintenance position, for example by the at least one positioning drive 226 , especially pneumatic cylinders 226 and / or electric motor 226 , the at least one printhead 212 and / or the at least one print head 212 having nozzle bars 213 pulls and / or presses against the at least one maintenance stop. This ensures that the maintenance position is reproducible and precisely defined.

At least one locking element, preferably the at least one third locking element and / or at least one locking element arranged between two locking elements and / or at least one maintenance stop is preferably designed to be movable in order to move between extreme positions of a travel of the at least one print head 212 and / or the at least one nozzle bar 213 , in particular to enable between the printing position and the assembly position. For example, there is at least one maintenance device 222 designed as at least one movable stop, in particular as a maintenance stop.

At least one maintenance device is preferably in the at least one maintenance position 222 at least one nozzle of the at least one print head 212 ; 412 assigned and / or assignable and is further preferably the at least one maintenance device 222 at least one nozzle of the at least one print head 212 ; 412 at least partially arranged and / or can be arranged opposite one another with respect to a respective ejection direction of the at least one nozzle.

A position of these respective at least one nozzle preferably differs when the print head is arranged in the at least one printing position 212 and a position of this respective at least one nozzle when the printhead is arranged in the at least one maintenance position and / or assembly position 212 on the through the axis of rotation 207 ; 407 of at least one, preferably as a central cylinder 201 trained printing substrate guide element 201 ; 401 specified axial direction A. based on at most 50%, more preferably at most 20% and even more preferably at most 10% and even more preferably at most 2% of one in the axial direction A. measured width of a working area of the at least one printhead 212 ; 412 having nozzle bar 213 and / or at most 50% and more preferably at most 20% and even more preferably at most 10% and even more preferably at most 2% of the maximum with the printing machine 01 processable printing material width specified working width of the printing machine 01 .

It is preferred when the print head is arranged in the at least one maintenance position 212 at least one maintenance device 222 between at least one nozzle of the at least one print head 212 ; 412 and one of these at least one nozzle area closest to the area for the printing material 02 provided transport path can be arranged and / or arranged and / or is arranged in the at least one maintenance position of the print head 212 at least one maintenance device 222 between at least one nozzle of the at least one print head 212 and can be arranged and / or arranged in a region of a transmission body that is closest to said at least one nozzle.

The at least one maintenance device 222 preferably has an extent in each spatial direction that is greater than 3 mm, more preferably greater than 10 mm. Preferably, the at least a maintenance device 222 in the axial direction A. an extension that is at least as large as the working area of the at least one nozzle bar 213 in the axial direction A. . The at least one maintenance device preferably has 222 in one transport direction of the printing material 02 an extension that is at least as large as the working area of the at least one nozzle bar 213 in the direction of transport of the printing material 02 . This means that preferably all nozzles of all print heads can 212 of the at least one nozzle bar 213 be serviced at the same time. For example, edge areas and / or housings result in even greater expansions in the respective directions.

The at least one nozzle bar 213 is preferably completely independent of such components of the printing machine 01 movable that the substrate web 02 touching and / or the intended transport route of the printing material 02 are arranged tangentially. Cleaning and / or maintenance can thus be carried out without the printing substrate web 02 to influence and especially without the substrate web 02 from the printing press 01 to have to remove.

The at least one maintenance device is preferred 222 at least orthogonal to the axial direction A. moveable. A provision path of the at least one maintenance device is preferred 222 by at least one feed device 223 set. The at least one feed device is preferred 223 as at least a guidance system 223 educated. The at least one maintenance device is preferred 222 arranged movably along the at least one supply path between at least one parking position and at least one deployment position. Preferably, the further preferably has through the at least one feed device 223 defined supply path of the at least one maintenance device 222 no component in the axial direction A. which is greater than at most 50%, more preferably at most 20%, even more preferably at most 10%, and even more preferably at most 2% of that in the axial direction A. measured width of the working area of the at least one print head 212 having nozzle bar 213 and / or at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of the maximum with the printing machine 01 processable printing material width specified working width of the printing machine 01 . This means that a possibly present component of the supply path of the at least one maintenance device 222 in the axial direction A. preferably at most 50%, more preferably at most 20%, even more preferably at most 10%, and even more preferably at most 2% of that in the axial direction A. measured width of the working area of the at least one print head 212 having nozzle bar 213 and / or at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of the maximum with the printing machine 01 processable printing material width specified working width of the printing machine 01 amounts to.

A distance of an axial movement of the at least one maintenance device that is only possibly present is therefore preferably 222 if it is present at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of that in the axial direction A. measured width of the working area of the at least one print head 212 ; 412 having nozzle bar 213 and / or at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of the maximum with the printing machine 01 processable printing material width specified working width of the printing machine 01 . The at least one maintenance device is also preferred 222 exclusively orthogonal to the axial direction A. moveable. The distance of a movement is in particular a length of a path covered and in this case in particular only the length of a component of the path covered or to be covered in the axial direction A. if such a component is present.

One preferably differentiates between the axial direction A. related intended position of the at least one maintenance device 222 in their parking position moves from one to the axial direction A. related intended position of the at least one maintenance device 222 in their use position by at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of one in the axial direction A. measured width of a working area of the at least one printhead 212 having nozzle bar 213 and / or at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% one through a maximum with the printing machine 01 processable printing material width specified working width of the printing machine 01 .

Each maintenance facility preferably has 222 in each case at least one own feed device 223 on. The at least one feed device preferably has 223 at least one feed drive 229 and at least one traction device 228 and / or pushing means 228 on. In one embodiment, the at least one feed drive is 229 stationary on a frame 231 the at least one printing unit 200 ; 400 arranged and is the at least one traction means 228 and / or pushing means 228 with the at least one maintenance device 222 connected and relative to the frame 231 the at least one printing unit 200 ; 400 designed to be movable, for example as a chain 228 . In an alternative embodiment, there is at least one feed drive 229 in particular together with the at least one maintenance device 222 movably arranged and is the at least one traction means 228 and / or pushing means 228 Arranged stationary and, for example, as at least one rail 228 and / or rack 228 educated. The at least one feed device preferably has 223 at least one rotatable threaded spindle, which is connected to at least one on the respective maintenance device 222 The supported spindle nut is in engagement, for example, by means of at least one, preferably as a stepper motor 229 trained feed drive 229 is rotatably arranged.

At least two maintenance devices are preferred 222 , in particular by means of their respective feed device 223 different ones of the at least two, in particular at least four, print heads 212 ; 412 are assigned and / or assignable, at least partially arranged one above the other, at least in their respective parking positions. These at least two maintenance devices are further preferred 222 , in particular by means of their respective feed device 223 different ones of the at least two, in particular at least four, print heads 212 ; 412 are assigned and / or assignable, at least in their use positions in one to the axial direction A. orthogonal direction relative to one another offset and / or arranged at a distance. In a preferred embodiment there are four nozzle bars 213 ; 413 arranged, each by means of a respective positioning device 217 ; 218 ; 219 ; 221 are arranged to be movable from their printing position in a respective linear adjusting direction. Furthermore, four are preferred as cleaning devices 222 trained maintenance devices 222 arranged and individually by means of respective feeding devices 223 Can be moved between the parking position and the deployment position. The respective feeding devices 223 each preferably have two on opposite sides of the frame 231 arranged rails 228 on. The respective feeding devices 223 each preferably have at least one feed drive 229 or two on opposite sides of the rack 231 arranged feed drives 229 on. The maintenance devices 222 are preferably arranged symmetrically about a plane of symmetry which is the axis of rotation 207 ; 407 of the at least one printing substrate guide element 201 ; 401 completely contains. The four supply paths preferably run horizontally and at a total of two different heights. For example are the maintenance devices 222 compared to the rails assigned to them 228 arranged elevated.

The respective assembly positions of two and more preferably all of the nozzle bars are preferred 213 ; 413 arranged at the same height and thus at different distances from the corresponding printing positions. The respective maintenance positions of two nozzle bars are preferred 213 ; 413 arranged at a first common height which differs from a second common height on which the respective maintenance positions of the other two nozzle bars 213 ; 214 are arranged. These heights differ, for example, by at least five centimeters. In this way there is enough space for all maintenance devices 222 present in their respective deployment positions, since these deployment positions differ in their height and therefore no collision from the different maintenance devices 222 required volumes comes about.

At least one print head is preferred 212 and more preferably any printhead 212 assigned a clear maintenance item. If the at least one maintenance device 222 is arranged in its use position, it serves, for example, as a third locking element, for example in the form of at least one maintenance stop.

The corresponding printhead 212 having nozzle bars 213 with the printhead in its maintenance position 212 preferably by applying a force by means of the at least one positioning drive 226 and / or by gravity, especially when the positioning drive is switched off 226 pulled and / or pressed against the maintenance device. This clearly defines the maintenance position. Alternatively and preferably, the respective positioning drive 226 in each case at least one stepper motor, by means of which the clear positions of the respective maintenance device 222 are controllable. In this way, one positioning drive is sufficient 226 and a feed drive 229 to the printheads 212 to be able to arrange reproducible and precise in their printing positions, maintenance positions and assembly positions.

Each maintenance position is preferably at least one print head 212 an unambiguous use position of at least one and preferably exactly one maintenance device 222 assigned. For example, the at least one maintenance device 222 as at least a protective cover 222 formed, more preferably by means of together with the at least one print head 212 ; 412 a closed volume can be limited. The at least one maintenance device is preferred 222 additionally or alternatively as at least one cleaning device 222 educated. The at least one maintenance device is preferred 222 as at least one inspection device 222 educated.

By way of example, in a first exemplary embodiment the at least one maintenance device 222 be assigned at least two or at least three deployment positions and / or at least one parking position in which the respective maintenance device 222 and more preferably optionally different maintenance devices 222 are arranged and / or can be arranged. Examples are for a total of four nozzle bars 213 a printing unit 200 ; 400 a total of two maintenance facilities 222 arranged, which each have at least two areas serving and / or usable as a protective cover and each or at least one of which has or has an area serving as a cleaning area. The at least one cleaning area can then be sequentially the nozzle bars to be cleaned 213 assign, whereupon the nozzles of the respective nozzle bar 213 getting cleaned. Once all the necessary cleaning processes have been completed, the at least one maintenance device can be closed 222 Arrange them in such a way that their two areas serving as protective covers each have a nozzle bar 213 are assigned, which then preferably deactivate the respective positioning drives 226 on the common maintenance device 222 be dropped off; be discontinued; be deducted; be dismissed. By way of example, each area serving as protective covers is optionally different nozzle bars 213 assignable so that it is possible to use individual nozzle bars 213 to be arranged in the printing position while covering other nozzle bars and protecting them against drying out, for example.

However, each nozzle bar is preferred 213 its own maintenance device 222 assigned and / or assignable and / or each maintenance device 222 exactly one operating position and exactly one parking position assigned, in which the respective maintenance device 222 is arranged and / or can be arranged. A total of four nozzle bars are preferred 213 a printing unit 200 ; 400 a total of four maintenance facilities 222 arranged, each with a protective cover 222 serving and / or usable area and each as cleaning devices 222 are trained. Once all the necessary cleaning processes have been completed, the at least one maintenance device can be closed 222 Arrange so that its as protective covers 222 Serving areas each have a nozzle bar 213 are assigned, which then, for example, deactivating the respective positioning drives 226 on the common maintenance device 222 or by stopping the respective positioning drives 226 be held in their maintenance position. For example, cleaning preferably takes place during the respective maintenance device 222 already as a protective cover 222 serves and / or is a cleaning area and a protective cover 222 serving area identical. Each is exemplary as a protective cover 222 serving maintenance device 222 optional and independent of other maintenance devices 222 the respective nozzle bar 213 assignable so that it is possible to use individual nozzle bars 213 to be arranged in the printing position and meanwhile other nozzle bars 213 cover and protect against dehydration, for example.

The at least one maintenance device is preferred 222 as at least one cleaning device 222 educated. The at least one cleaning device preferably has 222 at least one cleaning module, in particular at least one by means of at least one cleaning drive in and / or against the axial direction A. relative to the at least one printhead 212 ; 412 movable cleaning module. The at least one cleaning module preferably has at least one contact element, which by means of at least one adjusting drive with at least one nozzle surface of the at least one print head 212 ; 412 can be brought into contact, at least when the cleaning device 222 is arranged in its use position and the corresponding print head is arranged in its maintenance position. The at least one cleaning module preferably has at least one on the at least one print head 212 ; 412 and / or on the at least one contact element aligned and / or alignable first dispensing device for cleaning agent, for example at least one spray nozzle. The at least one contact element is preferably designed as at least one wiper.

It is preferred if at least one printhead is arranged in the printing position 212 at least one nozzle of this at least one print head 212 is arranged below the supply path, along which the at least one maintenance device 222 preferably by means of the at least one feed device 223 is preferably arranged movably between the at least one parking position and the at least one use position. It is preferred when at least one print head is arranged in the rest position 212 this at least one nozzle is arranged above this supply path.

A travel range of at least one print head 212 is preferably a preferably predetermined path along which the at least one print head 212 is movable, in particular around the at least one print head 212 to move between its printing position and its rest position, for example maintenance position and / or assembly position. The adjustment path of the at least one print head preferably has 212 no component in the axial direction A. which is greater than at most 50%, more preferably at most 20%, even more preferably 10% and even more preferably at most 2% of the axial direction A. measured width of the working area of the at least one print head 212 having nozzle bar 213 and / or at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of the maximum with the printing machine 01 processable printing material width specified working width of the printing machine 01 . This means that an optionally present component of the at least one print head 212 in the axial direction A. preferably at most 50%, more preferably at most 20%, even more preferably at most 10%, and even more preferably at most 2% of that in the axial direction A. measured width of the working area of the at least one print head 212 having nozzle bar 213 and / or at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of the maximum with the printing machine 01 processable printing material width specified working width of the printing machine 01 amounts to.

At least a first of the at least two print heads is preferred 212 in particular the first printing unit 200 preferably in each case by means of a first positioning device assigned to it 217 optionally can be arranged at least either in the first printing position assigned to it or in a first rest position assigned to it, in particular maintenance position and / or assembly position, wherein in the at least one first rest position a rest position of at least one first nozzle of the at least one first of the at least two print heads 212 a first rest distance, in particular maintenance distance and / or assembly distance from a first working position of the same at least one first nozzle of the same at least one first of the at least two print heads 212 has in its first printing position. At least a second of the at least two print heads is preferred 212 , in particular this first printing unit 200 preferably in each case by means of a second positioning device assigned to it 218 optionally can be arranged at least either in a second printing position assigned to it or in a second idle position assigned to it, in particular maintenance position and / or assembly position, wherein in the at least one second idle position a rest position of at least one second nozzle of the at least one second of the at least two print heads 212 a second rest distance, in particular maintenance distance and / or assembly distance from a second working position of the same at least one second nozzle of the same at least one second of the at least two print heads 212 has in its second printing position. The first rest distance, in particular maintenance distance and / or assembly distance, differs from the second rest distance, in particular maintenance distance and / or assembly distance, by at least 2 cm, more preferably at least 5 cm, even more preferably at least 10 cm and even more preferably at least 20 cm. In particular, a rest distance is a distance between a position of a nozzle when the printhead is arranged in its rest position and has this nozzle 212 and a location of the same nozzle with the same printhead positioned in its printing position 212 .

In particular, the at least one first print head is preferred 212 by means of at least one first positioning device assigned to it 217 optionally can be arranged at least either in a first printing position assigned to it or in a first rest position assigned to it, in particular first maintenance position and / or first assembly position. In particular, the at least one second print head is preferred 212 by means of at least one second positioning device assigned to it 218 optionally can be arranged at least either in a second printing position assigned to it or in a second rest position assigned to it, in particular a second maintenance position and / or a second assembly position.

The printing press therefore preferably has 01 and even more preferably any printing unit 200 ; 400 at least two positioning devices 217 ; 218 ; 219 ; 221 on each of which at least one of the at least two print heads 212 ; is assigned and by means of which the at least two print heads 212 ; 412 each movable and each optionally designed to be able to be arranged at least either in a respective printing position and / or at least in a respective rest position, for example a maintenance position and / or assembly position. Each printing unit preferably has 200 ; 400 at least four such positioning devices 217 ; 218 ; 219 ; 221 on.

A minimum distance between the at least one first nozzle of the at least one first print head, preferably referred to as the rest distance, in particular the maintenance distance and / or assembly distance, is preferred 212 ; 412 in its first rest position, in particular maintenance position and / or assembly position and the at least one second nozzle of the at least a second printhead 212 ; 412 in its second rest position, in particular the maintenance position and / or assembly position, by at least 2 cm, more preferably at least 5 cm, even more preferably at least 10 cm and even more preferably at least 20 cm larger than a minimum distance, preferably referred to as the working distance, between at least one first nozzle of the at least one first print head 212 ; 412 in its first printing position and the at least one second nozzle of the at least one second print head 212 ; 412 in its second printing position.

For example, an ejection direction differentiates at least one first nozzle of the at least one first print head 212 ; 412 in the first printing position this at least one first nozzle of the at least one print head extends from an ejection direction 212 ; 412 in the first rest position, in particular the maintenance position and / or assembly position, at an angle of at least 5 °, more preferably at least 10 °, even more preferably at least 15 ° and even more preferably at least 20 °. A position of the at least one nozzle preferably differs when the print head is arranged in the at least one printing position 212 and a position of the at least one nozzle when the print head is arranged in the at least one rest position, in particular the maintenance position and / or assembly position 212 on the through the axis of rotation 207 of the at least one printing substrate guide element 201 specified axial direction A. based on at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of that in the axial direction A. measured width of the working area of the at least one print head 212 having nozzle bar 213 and / or at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of the maximum with the printing machine 01 processable printing material width specified working width of the printing machine 01 . A plane in which this distance and / or this angle is measured is preferably defined by a surface normal that is parallel to the axial direction A. lies or from this axial direction A. deviates by at most 2 °; this plane is more preferably the axial projection plane.

This printing machine preferably allows a method for positioning at least one as an inkjet print head 212 trained printhead 212 at least one printing unit 200 ; 400 the printing press 01 , with at least one print head in a shutdown process 212 the at least one printing unit 200 ; 400 is moved in at least one adjusting direction and / or along an adjusting path from a printing position to at least one rest position, in particular a maintenance position and / or assembly position, and / or from a provided transport path of the at least one printing substrate web 02 is turned off and / or by a printing substrate guide element 201 is parked and / or is parked by a transmission body and this at least one adjustment direction preferably at least partially and more preferably completely orthogonal to one through the axis of rotation 207 of the at least one printing substrate guide element 201 specified axial direction A. is oriented.

At least one printing unit is preferred 200 ; 400 the printing press 01 at least at times at least one drawing-in means, which can be moved along at least one drawing-in path, for drawing in a web of printing material 02 and / or along at least one intended transport path of the printing substrate web 02 Movable pull-in means for pulling in a web of printing material 02 arranged and / or arrangeable. As described, the at least one print head is particularly preferred 212 ; 412 designed to be movable along an adjustment path in an adjustment direction, the adjustment direction preferably having at least one component that is orthogonal to one through the axis of rotation 207 ; 407 of the at least one printing substrate guide element 201 ; 401 specified axial direction A. is oriented. Preferably, at least parts of the at least one retraction path, and more preferably the complete retraction path, point in the axial direction A. related to each target area of each nozzle of each printhead 212 ; 412 this pressure unit 200 ; 400 a distance of at least 2 cm, more preferably at least 4 cm, even more preferably at least 6 cm and even more preferably at least 8 cm. At least parts of the pull-in means and more preferably the complete pull-in means preferably point in the axial direction A. related to each target area of each nozzle of each printhead 212 ; 412 this pressure unit 200 ; 400 a distance of at least 2 cm, more preferably at least 4 cm, even more preferably at least 6 cm and even more preferably at least 8 cm.

In particular, the at least one pull-in path and / or the at least one pull-in means is preferred with respect to the axial direction A. outside the working area of the at least one print head 212 having nozzle bar 213 and / or outside a working width of the printing machine 01 arranged. The adjustment direction of the at least one print head 212 preferably has at least one component in a direction of a normal vector of the at least one print head 212 ; 412 next surface element of the intended transport path of the printing substrate web 02 on. That means that the at least one printhead 212 is arranged movable or parkable away from the intended transport path, in particular for pulling in a printing substrate web 02 into the printing press 01 and / or in particular by means of at least one positioning device 217 ; 218 ; 219 ; 221 . The printing press preferably has 01 at least temporarily and further preferably permanently at least one and further preferably precisely one drawing-in means for drawing in a printing substrate web 02 along an intended transport path of the printing substrate web 02 on.

At least one printing substrate web is preferred 02 over at least one more preferred than at least one pull-in tip formed connecting element connected and / or connectable to the at least one pull-in means, in particular regardless of the design of the at least one pull-in means as a pull-in belt and / or pull-in chain and / or endless pull-in means and / or finite pull-in means. A pull-in point is preferably a flat means, the smallest dimension of which is preferably smaller than 5 mm and which preferably has an essentially triangular shape and on one edge of which an adhesive and / or adhesive is preferably provided and which is preferably at least on a tip opposite this edge has a fastening means. The adhesive and / or adhesive preferably serves to connect the drawing-in tip to a printing material 02 . The at least one fastening means is preferably used for a releasable fastening of the pull-in tip with the at least one pull-in means.

The at least one drawing-in means is preferably designed as at least one endless drawing-in means, for example as at least one endless drawing-in belt. The at least one pull-in means is alternatively designed as at least one finite pull-in means, for example as a finite pull-in belt and / or as a finite pull-in chain. A finite pull-in tape is preferably rewound after a pull-in process, that is, moved in the opposite direction along the pull-in path. At least one pull-in drive is preferably arranged, by means of which the at least one pull-in means is arranged to be movable along the at least one pull-in path. For example, in the case of an endless pull-in means, it is sufficient if precisely one such pull-in drive is arranged.

Alternatively, the at least one pull-in means is finite. At least one drawing-in storage device is then preferably arranged, in which the at least one drawing-in means can be arranged at least temporarily, in particular as long as it is not used for a web of printing material 02 to move in. In an alternative embodiment, the at least one pull-in means is designed as at least one finite pull-in chain. In the preferred case of the at least one endless drawing-in means, the at least one drawing-in means is preferably used for drawing in a web of printing material 02 along the intended transport path of the substrate web 02 in particular permanently along its at least one feed path within the printing press 01 arranged. The at least one drawing-in means for drawing in a printing substrate web is particularly preferred 02 along the intended transport path of the substrate web 02 permanently along its at least one feed path within the at least one printing unit 200 ; 400 the printing press 01 arranged.

At least one pull-in guide element is preferably arranged, by means of which at least one pull-in path of the at least one pull-in means can be fixed and / or fixed. The at least one draw-in guide element is designed, for example, as at least one deflection roller. The at least one pull-in guide element is alternatively designed as at least one chain rail. The at least one draw-in guide element is preferably designed as at least one rotatable draw-in guide element, for example as at least one deflection roller. The at least one rotatable retraction guide element and in particular the at least one deflection roller about the same axis of rotation are preferred 207 ; 407 arranged rotatably, like at least one printing substrate guide element 201 ; 401 a printing unit 200 ; 400 the printing press 01 , for example like the at least one central cylinder 201 ; 401 . In particular, a chain rail can also have switches for realizing different pull-in paths.

The at least one preferably endless drawing-in means preferably has at least two and more preferably at least five connecting points each, at which at least one printing substrate web 02 directly and / or via at least one connecting element, for example a pull-in tip, with which at least one pull-in means can be connected. The at least two and more preferably at least five connection points preferably point in the axial direction A. based on a distance of at most 10 cm (ten centimeters), more preferably at most 5 cm (five centimeters), even more preferably at most 2 cm (two centimeters) and even more preferably no distance at all. The at least two and more preferably at least five connection points in the axial direction are even more preferred A. based on the same position. Preferably, the at least two and more preferably at least five connection points along the at least one and preferably exactly one retraction path are spaced apart, more preferably by at least 10 cm (ten centimeters), even more preferably by at least 50 cm (fifty centimeters) and even more preferably by at least 100 cm (one hundred centimeters). For example, the at least one pull-in means has connection points designed as eyes and / or hooks and / or the at least one connection element accordingly has at least one hook and / or at least one eye. Such a hook and / or such an eyelet forms the at least one fastening means, for example.

The pull-in path of the at least one pull-in means preferably encloses the at least one, more preferably as at least one central cylinder 201 ; 401 trained rotatable printing substrate guide element 201 ; 401 from an axis of rotation 207 ; 407 of the at least one printing substrate guide element 201 ; 401 viewed from and / or viewed in the axial projection plane in an angular range of at least 180 ° and more preferably at least 270 °. The draw-in path of the at least one draw-in means has, at least along this angular range, a radius of curvature that is at most 5 cm, more preferably at most 2 cm and even more preferably at most 1 cm from a radius of curvature of this at least one printing substrate guide element 201 ; 401 , especially this central cylinder 201 ; 401 deviates.

A projection of the for printing material, which is in particular in the axial projection plane, preferably overlaps 02 provided transport path in the axial direction A. and a projection, in particular in the axial projection plane, of the retraction path provided for the at least one retraction means in the axial direction A. at least partially, more preferably over 25% of a length of the projection of the pull-in path provided for the pull-in means and even more preferably over 50% of this length.

This printing press preferably allows a method for drawing in at least one web of printing material 02 in at least one printing unit 200 ; 400 the printing press 01 , with at least one as an inkjet printhead in a shutdown process 212 trained printhead 212 the at least one printing unit 200 ; 400 in at least one adjusting direction and / or along an adjusting path of a provided transport path of the at least one printing substrate web 02 is turned off and this at least one adjusting direction preferably at least partially and more preferably completely orthogonal to one through the axis of rotation 207 of the at least one printing substrate guide element 201 specified axial direction A. is oriented, and afterwards at least one drawing-in means along a drawing-in path through the at least one printing unit in a drawing-in process 200 ; 400 is moved and thereby the at least one printing substrate web 02 along an intended transport path for the at least one printing substrate web 02 pulls and wherein the retraction path and the transport path in the axial direction A. are spaced apart from one another, more preferably by at least 2 cm, even more preferably by at least 4 cm, even more preferably at least 6 cm and even more preferably at least 8 cm. For pulling in the at least one printing substrate web 02 it is not necessary to have at least one printhead 212 in the parking process to move into its maintenance position and / or assembly position. It is sufficient if there is a sufficiently large distance from the substrate 02 and / or to the connecting element results in the at least one print head 212 to protect against damage. The at least one print head is then preferably used in a setting process 212 preferably against the at least one adjusting direction and / or along an adjusting path to the intended transport path of the at least one printing substrate web 02 is employed and / or is positioned in its printing position.

The at least one drawing-in means is preferably used in a connecting process, in particular prior to the drawing-in process, by means of at least one connecting element with the at least one printing substrate web 02 connected. The at least one pull-in means is preferably connected to the at least one pull-in means in the connection process by means of the at least one connection element at exactly one of the at least two, more preferably at least five connection points provided on the at least one pull-in means. The at least one connecting element preferably passes a printing position of the at least one print head 212 , while this is parked from the intended transport path and / or arranged in at least one rest position. During the pulling-in process, the at least one connecting element preferably passes at least one target area of at least one nozzle of the at least one print head 212 . Preferably, during the drawing-in process, no component of the at least one drawing-in means passes a target area of a nozzle of the at least one print head at all 212 . This means that preferably all components of the at least one pulling means any target area of any nozzles of the at least one print head 212 bypass.

This results in at least one operating state in which the at least one drawing-in means is connected to the printing material by means of the at least one connecting element 02 is connected and in which the at least one print head 212 is parked from the intended transport path and / or is arranged in at least one rest position and in which preferably at least one nozzle is aligned with its discharge direction on the at least one connecting element. The at least one connecting element with the at least one printing substrate guide element is preferably in the at least one operating state 201 in particular with the at least one central cylinder 201 in contact. Alternatively or additionally, the at least one connecting element is preferably in contact with at least one transmission body in the at least one operating state. In this operating state, the at least one pull-in means preferably points in the axial direction A. related to each target area of each nozzle of each printhead 212 ; 412 this pressure unit 200 ; 400 a distance of at least 2 cm, more preferably at least 4 cm, even more preferably at least 6 cm and even more preferably at least 8 cm.

Preferably, only at least one pull-in means is arranged, which points in the axial direction A. based on only one side of the intended transport route for printing material 02 is arranged and / or its retraction path only on one side of the intended transport path for printing material 02 runs. Preferably, only at least one pull-in means is used, which acts in the axial direction A. based on only one side of the intended transport path for printing material 02 is arranged and / or its retraction path only on one side of the intended transport path for printing material 02 runs.

After the substrate web 02 the at least one first printing unit 200 has happened, the substrate web will 02 transported further along their transport route and preferably the at least one first dryer 301 the at least one dryer unit 300 fed. The first of the at least one first printing unit is preferably located 200 printed side of the substrate web 02 between a last point of contact on the substrate web 02 with the at least one first central cylinder 201 the at least one first printing unit 200 and an area of action of the at least one first dryer 301 with no part of the web press 01 in contact. The second, in particular of the first, printing unit is preferably located 200 not printed, the at least one first central cylinder 201 the at least one first printing unit 200 touching side of the substrate web 02 between the last point of contact of the substrate web 02 with the first central cylinder 201 the at least one first printing unit 200 and the area of action of the at least one first dryer 301 with at least one deflection roller 214 the at least one first printing unit 200 and / or with at least one deflection roller 312 of the at least one first dryer 301 in contact. At least one, more preferably a third, measuring roller is preferred 214 trained third measuring device 214 arranged. This third measuring device 214 is used to measure the web tension. The at least one deflection roller is further preferred 214 the first printing unit 200 with the third measuring roller 214 trained third measuring device 214 identical.

The at least one first dryer 301 is preferred as an infrared radiation dryer 301 educated. The at least one first dryer 301 preferably has at least one radiation source 302 on, which is preferred as an infrared radiation source 302 is trained. A source of radiation 302 , preferably infrared radiation source 302 is a device by means of which electrical energy is specifically converted into radiation, preferably infrared radiation, and / or can be converted and onto the printing substrate web 02 is directed and / or can be directed. The at least one radiation source 302 preferably has a defined area of action. In particular, the area of action is a radiation source 302 in each case the area which contains all points, in particular straight lines directly or via reflectors with the radiation source without interruption 302 can be connected. The area of action of the at least one first dryer 301 consists of the areas affected by all radiation sources 302 of the at least one first dryer 301 together. The area of action of the at least one first dryer 301 preferably points from the at least one radiation source 302 to one of the at least one radiation source 302 nearest part of the transport path of the substrate web 02 . Air is drawn into the interior of the at least one first dryer through at least one ventilation opening 301 initiated. Inside the first dryer 301 is emitted from the substrate web by the infrared radiation 02 to be removed water and / or solvent of the printing inks removed and taken up by the air introduced. This air is then discharged from the at least one first dryer through at least one ventilation opening 301 discharged.

In a preferred embodiment, the intended transport path has for printing material 02 through the at least one first dryer 301 at least two sections, each running in directions with vertical components, more preferably with larger vertical components than any horizontal components that may be present. The envisaged transport path of the printing material preferably runs along the one section with at least one component in the vertical direction upwards. The envisaged transport path of the printing material preferably runs along the other section with at least one component in the vertical direction downwards. The one section and the other section of the intended transport path are preferably connected to one another by at least one intended connecting piece of the intended transport path. The at least one connecting piece preferably runs in a direction with a horizontal component, more preferably with a larger horizontal component than any vertical component that may be present. This means that at least one dryer can 301 are preferably designed to be particularly compact.

In the transport direction of the substrate web 02 according to the area of action of the at least one radiation source 302 of the at least one first dryer 301 is preferably at least a first cooling device 303 arranged. The at least one first cooling device 303 preferably has at least one first cooling roller 304 and preferably a first, to the at least one first cooling roller 304 adjustable and / or employed chill roll presser 306 and preferably at least one, to the at least one first cooling roller 304 adjustable and / or adjusted guide roller 307 ; 308 on. One of the at least one first chill roll 304 assigned first, as the first cooling roller drive motor 311 trained drive motor 311 and the first chill roll presser 306 are preferably part of a web tension control, that is to say arranged to regulate the web tension and are preferably connected at least partially and / or temporarily to the higher-level machine control for this purpose. The at least one first chill roll 304 preferably provides at least a fourth motor-driven rotary body 304 represents. The substrate web 02 wraps around and preferably touches the at least one first cooling roller along its transport path 304 with a wrap angle of preferably at least 180 ° and more preferably at least 270 °. The first chill roll presser 306 preferably forms with the at least one first cooling roller 304 a first cooling nip 309 , in which the substrate web is preferred 02 is arranged and / or preferably the printing substrate web 02 passes through. The substrate web is thereby 02 from the chill roll presser 306 to the at least one first cooling roller 304 pressed on. The at least one first chill roll 304 the at least one first cooling device 303 is preferred as a cooling roller through which a coolant flows 304 educated.

Along the transport path of the substrate web 02 after the at least one first cooling device 303 is preferably at least one second printing unit 400 arranged. The printing substrate web is preferred along the transport path 02 preferably immediately in front of the at least one second printing unit 400 and preferably after the at least one first dryer 301 and in particular after the at least one first printing unit 200 at least one second web edge aligner is arranged, which is preferably designed so that it can be controlled and / or regulated manually or in a driven manner. The at least one second printing unit 400 is analogous to the first printing unit 200 built up. In particular, the second printing unit 400 a second central printing cylinder 401 or short central cylinder 401 on that of the printing substrate web during printing 02 is wrapped around, also with a wrap angle of preferably at least 180 ° and more preferably at least 270 °. The second central cylinder 401 preferably provides a fifth motor-driven rotary body 401 The second central cylinder 401 the second printing unit 400 preferably has a direction of rotation that corresponds to a direction of rotation of the at least one first central cylinder 201 is opposite. Along the transport path of the substrate web 02 in front of the second central cylinder 401 the second printing unit 400 is preferably a second printing substrate cleaning device 402 or web cleaning device 402 onto the substrate web 02 arranged acting.

The transport route of the substrate web 02 by the at least one second printing unit 400 runs analogously to the transport path through the at least one first printing unit 200 . In particular, the web of printing material wraps around it 02 preferably part of a second deflection roller 403 and is deflected by this in such a way that the transport path of the printing substrate web 02 in the second gap 404 both tangential to the second deflection roller 403 as well as tangential to the second central cylinder 401 runs. At least one is preferred as a second impression roller 406 trained cylinder 406 in the second printing unit 400 arranged. The second impression roller 406 is preferably analogous to the first impression roller 206 constructed and arranged, in particular with regard to its mobility and a second impression roller gap 409 . The second central cylinder 401 is preferably analogous to the first central cylinder 201 arranged and constructed, in particular with respect to a second drive motor 408 of the second central cylinder 401 and a corresponding, preferably arranged, second angle of rotation sensor that measures an angle of rotation position of the second drive motor 408 and / or the second central cylinder 401 self-measuring and / or capable of measuring and is designed to be capable of sending and / or sending to the higher-level machine control.

Inside the second printing unit 400 is preferably at least a second, as an inkjet printing unit 411 or ink-jet printing unit 411 trained printing unit 411 in the direction of rotation of the second central cylinder 401 and thus along the transport path of the substrate web 02 after the second impression roller 406 on the second central cylinder 401 aligned. That at least a second printing unit 411 the at least one second printing unit 400 is preferably identical to the at least one first printing unit 211 the at least one first printing unit 200 , in particular with regard to at least one nozzle bar 413 , at least one, as an inkjet printhead 412 trained printhead 412 and their arrangement in double rows, the execution and resolution of the printing process, the arrangement, alignment and control of the nozzles and the mobility and adjustability of the at least one nozzle bar 413 and the at least one printhead 412 means of at least one adjustment mechanism with a corresponding electric motor. An analog protective cover and / or cleaning device is also preferably arranged. Also correct alignment of the printheads 412 the at least one second printing unit 400 is preferably checked in that at least one sensor detects a printed print image and the machine control evaluates this print image. This at least one sensor is preferably at least one second print image sensor, which is designed analogously to the at least one first print image sensor. This is preferably at least one second printing unit 411 as a four-color printing unit 411 educated.

Regarding the transport route of the substrate web 02 is after the at least one second printing unit 400 at least a second dryer 331 arranged. After the substrate web 02 the at least one second printing unit 400 has happened, the substrate web will 02 transported further along their transport route and preferably the at least one second dryer 331 the at least one dryer unit 300 fed. The at least one second dryer 331 is preferably analogous to the at least one first dryer 301 built up. The at least one first dryer 301 and the at least one second dryer 331 are components of the at least one dryer unit 300 . The second of the at least one second printing unit is preferably located 400 printed side of the substrate web 02 between a last point of contact on the substrate web 02 with the second central cylinder 401 the at least one second printing unit 400 and an area of action of the at least one second dryer 301 with no part of the web press 01 in contact. At least one deflection roller is preferred 414 the second printing unit 400 arranged.

This is preferably at least one deflection roller 414 as the fifth measuring device 414 , especially fifth measuring roller 414 educated.

The structure of the at least one second dryer 331 is similar to the structure of the at least one first dryer 301 , in particular with regard to a transport route provided for printing material and / or a design as a flow dryer 331 and / or radiation dryer 331 and / or hot air dryer 331 and / or infrared radiation dryer 331 and / or UV radiation dryer 331 . In particular, the at least one second dryer 331 preferably at least one second cooling roller 334 on, which further preferably has at least one sixth motor-driven rotary body 334 represents. The second cooling roller is preferred 334 by means of a second cooling roller drive 341 driven and / or drivable. The at least one second dryer is preferred 331 with regard to the components described, essentially and more preferably completely symmetrical to the at least one first dryer 301 built up. The at least one second dryer 331 is preferably part of the same dryer unit 300 like the at least one first dryer 301 and is more preferably in the same housing 329 arranged. With regard to a spatial arrangement, the dryer unit is 300 and are therefore preferably the at least one first dryer 301 and the at least one second dryer 331 preferably between the at least one first printing unit 200 and the at least one second printing unit 400 arranged.

Along the transport path of the substrate web 02 after the at least one second dryer 331 is at least one pull-out roller 501 arranged. The at least one pull-out roller 501 preferably has its own, as a pull-out roller drive 504 trained drive motor 504 on. The at least one pull-out roller 504 preferably provides at least a seventh motor-driven rotary body 504 The at least one pull-out roller 501 preferably forms together with one of the at least one pull-out roller 501 employed and / or employable extraction press 502 a pull-out gap 503 in which the substrate web 02 is clamped and through which the substrate web 02 is promoted. The pull-out gap 503 is preferably used to regulate a web tension and / or a transport of the printing substrate web 02 .

Regarding the transport route of the substrate web 02 before and / or after the pull-out roller 501 , but especially along the transport path of the printing material 02 after at least one first dryer 301 , at least one re-moistening device is preferably arranged, which preferably results in too great a loss of moisture in the printing substrate web 02 due to the treatment by the dryer unit 300 compensates.

Along the transport path of the substrate web 02 after the pull-out gap 503 and / or after the rewetting device is at least one post-processing device 500 arranged, preferably as a folding device 500 is formed and / or a sheet cutter 500 and / or a plan display 500 has or as a winder 500 is trained. In this and / or through this post-processing device 500 becomes the substrate web 02 preferably folded and / or cut and / or stapled and / or sorted and / or enveloped and / or dispatched and / or wound up.

In at least one variant of the printing machine, the printing machine is 01 as a web-fed rotary inkjet printing machine 01 and at least one transmission body is formed with the at least one first central pressure cylinder 201 arranged to form a transfer gap. Then the at least one print head is preferred 212 aligned with the at least one transmission body.

List of reference symbols

01

Printing machine, inkjet printing machine, web printing machine, webbing inkjet printing machine, rotary printing machine, webbing rotary printing machine, webbing rotary inkjet printing machine

02

Printing material, printing material web, paper web, textile web, foil, plastic film, metal foil

100

Printing material source, roll unwinding device, roll changer

101

Substrate roll

102

-

103

Roll holding device, clamping device, clamping mandrel, clamping cone, clamping device, clamping mandrel, clamping cone, clamping shaft; Solid of revolution, first

104

Drive motor, electric motor ( 103 )

107

Beam ( 101 )

108

Axis, carrier, support frame ( 107 )

109

Swivel axis ( 108 )

110

-

111

Axis of rotation ( 101 ; 103 )

112

frame

113

Dancer roll

114

Edge aligner, first

115

-

116

Alignment roller

117

Pull press

118

Pull roller; Solid of revolution, second

119

Feed gap

120

-

121

Dancer lever

139

Feed mechanism

140

-

141

Measuring roller, feed measuring roller, measuring device, first

146

Drive motor, traction drive motor ( 118 )

200

Unit of pressure, first

201

Printing material guide element, central printing cylinder, central cylinder, first; Solid of revolution, third

202

Printing material preparation device, web preparation device, coating device, corona device, discharge device, printing material cleaning device, web cleaning device, dedusting device, first

203

Roller, deflection roller, substrate guide element

204

Space ( 201 ; 203 )

205

-

206

Cylinder, impression roller, first

207

Axis of rotation ( 201 )

208

Drive motor, electric motor, direct drive, individual drive, synchronous motor

209

Impression gap, first

210

-

211

Printing unit, inkjet printing unit, ink-jet printing unit, four-color printing unit, first

212

Printhead, inkjet printhead, first

213

Nozzle bar, first

214

Deflection roller, measuring roller, measuring device, third, printing substrate guide element

215

-

216

Measuring roller, measuring device, second

217

Positioning device, first

218

Positioning device, second

219

Positioning device, third

220

-

221

Positioning device, fourth

222

Maintenance device, cleaning device, inspection device

223

Feed device, guide system

224

Positioning guide, lever arm, rail

225

-

226

Positioning drive, electric motor, stepper motor, hydraulic cylinder, pneumatic cylinder

227

Swivel axis ( 212 ; 213 ; 217 ; 218 ; 219 ; 221 )

228

Pulling means, pushing means, chain, rail, rack

229

Feed drive, stepper motor

230

-

231

Frame ( 200 ; 400 )

251

Supply system, ink supply system

252

Normal supply

253

Liquid pipe, paint pipe, first

254

Supply line

255

-

256

Derivation

257

Cache

258

Overflow drain

259

Filter device

260

-

261

Degassing device

262

Valve, shut-off valve, first

263

Valve, shut-off valve, second

264

Liquid pump, first

265

-

266

Gas room, first

267

Gas pipe, first

268

Vacuum source, gas pump, first

269

Gas compartment, second

270

-

271

Gas pipe, second

272

Buffer storage

273

Supply line, suction line

274

Storage container

275

-

276

Vacuum source, vacuum buffer

277

Vacuum source, vacuum regulator

278

Vacuum supply line

279

Degassing line

280

Return valve

281

Vacuum line

282

Normal pressure line

283

Pressure regulator

284

Compressed air source, air pump, atmosphere connection

285

Return pump

286

Compensation line

287

Overflow

288

Supply line

289

Storage pump

290

Gas room, third

291

Supply valve

292

Supply air filter

293

Liquid trap, coating agent trap

294

Vacuum sensor

295

Return memory

296

Supply pump

297

Flow meter

298

Supply valve, local

299

Damping device

300

Dryer unit

301

Dryer, infrared radiation dryer, radiation dryer, flow dryer, UV radiation dryer, hot air dryer, first

302

Radiation source, infrared radiation source

303

Cooling device, first

304

Chill roll, first; Solid of revolution, fourth

305

-

306

Chill roll presser

307

Articulation roller, first

308

Articulation roller, second

309

Chill nip, first

310

-

311

Drive motor, cooling roller drive motor ( 304 ), first

312

Deflection roller, substrate guide element

329

Casing ( 300 )

330

-

331

Dryer, infrared radiation dryer, flow dryer, radiation dryer, hot air dryer, UV radiation dryer, second

332

-

333

Cooling device, second

334

Chill roll, second; Solid of revolution, sixth

335

-

336

Chill roll presser, second

339

Cooling nip, second

340

-

341

Drive motor, cooling roller drive motor ( 334 ), second

342

-

343

Measuring roller, measuring device, sixth

400

Pressure unit, second

401

Printing substrate guide element, central printing cylinder, central cylinder, second; Solid of revolution, fifth

402

Substrate cleaning device, web cleaning device, dedusting device, second

403

Roller, deflection roller, substrate guide element

404

Space ( 401 ; 403 )

405

-

406

Cylinder, impression roller, second

407

Axis of rotation ( 401 )

408

Drive motor, direct drive, electric motor, single drive, synchronous motor

409

Impression gap, second

410

-

411

Printing unit, inkjet printing unit, ink-jet printing unit, four-color printing unit, second

412

Printhead, inkjet printhead, second

413

Nozzle bar, second

414

Deflection roller, measuring roller, fifth, substrate guide element

415

-

416

Measuring roller, measuring device, fourth

500

Post-processing device, folding device, winding device, sheet cutter, flat delivery

501

Extract roller, rotating body, seventh

502

Extract presser

503

Pull-out gap

504

Drive motor, pull-out roller drive ( 501 )

A.

Direction, axial

Claims (11)

Printing press (01) which has at least one first printing unit (200; 400) and at least one supply system (251) for coating agents, the at least one first printing unit (200; 400) having at least two on at least one first movable nozzle bar (213; 413) arranged print heads (212; 412) and wherein the at least one supply system (251) has at least one normal supply (252) and at least one return memory (295) and at least one intermediate memory (257) and wherein the at least two print heads (212; 412) have in each case at least one first liquid line (253) connected to the at least one normal reservoir (252) and / or arranged so as to be connectable, and wherein the at least one normal reservoir (252) has at least one overflow outlet (258) that flows via the at least one return reservoir (295) and at least one derivative (256) is connected and / or connectable to the at least one intermediate store (257) and wherein the at least one intermediate memory The storage tank (257) is connected and / or connectable to the at least one normal supply (252) via at least one supply line (254) and at least one valve (262) designed as a first shut-off valve (262) is disposed within the at least one supply line (254) and wherein the at least one normal supply (252) and the at least one return storage (295) together with the at least one nozzle bar (213; 413) are movably arranged, characterized in that the at least one nozzle bar (213; 413) can be optionally arranged at least either in a printing position assigned to it or at least in a maintenance position assigned to it by means of at least one positioning device (217; 218; 219; 221) and that an adjustment direction of an adjustment path of the at least one nozzle bar (213; 413) has at least one component in the vertical direction which is at least 10 cm and that a position of at least one reference nozzle of a respective print head (212; 412) is in its printing position and a position of this is at least a reference nozzle of the respective print head (212; 412) in its maintenance position in relation to an axial direction (A) defined by a rotation axis (207; 407) of at least one printing substrate guide element (201; 401) of the printing unit (200; 400) by a maximum of 50% in the axial direction (A) measured width of a working area of the respective print head f (212; 412) having nozzle bars (213; 413) and / or at most 50% of a working width of the printing machine (01) defined by a maximum printing material width that can be processed with the printing machine (01) and that between the at least one overflow outlet (258) and the at least one return reservoir (295) a section of the at least one discharge line (256) is arranged, within which at least one valve (263) designed as a second shut-off valve (263) is arranged. Printing press after Claim 1 , characterized in that at least one return pump (285) is arranged along the at least one discharge line (256) after the at least one return storage tank (295) and / or that along the at least one discharge line (256) after the at least one overflow drain (258) and The at least one return reservoir (295) is arranged in front of each pump. Printing press after Claim 1 or 2 , characterized in that the at least one nozzle bar (213; 413) is arranged to be movable relative to a frame (213) of the printing unit (200; 400) by means of the at least one positioning device (217; 218; 219; 221) and that the at least one Intermediate store (257) is arranged stationary relative to the frame (213) of the printing unit (200; 400). Printing press after Claim 1 and / or 2 and / or 3, characterized in that at least one volume provided as a first gas space (266) is arranged in the at least one normal supply (252), which volume is provided via at least one first gas line (267) with at least one first gas pump (268 ) is connected and / or connectable. Printing press after Claim 1 and / or 2 and / or 3 and / or 4, characterized in that at least one volume provided as a gas space (290) is arranged in the at least one return reservoir (295) which is connected to at least one first equalizing line (286) via at least one first equalizing line (286) Gas pump (268) is connected and / or connectable. Printing press after Claim 4 and 5 , characterized in that the at least one first gas line (267) and the at least one equalizing line (286) can be separated and / or connected to one another via at least one pressure regulator (283). Printing press after Claim 1 and / or 2 and / or 3 and / or 4 and / or 5 and / or 6, characterized in that a gas volume is arranged in the at least one normal supply (252) and that the at least one gas volume has a normal pressure which is lower is, as an ambient pressure prevailing on an ejection side of at least one nozzle of the at least one print head (212; 412). Printing press after Claim 1 and / or 2 and / or 3 and / or 4 and / or 5 and / or 6 and / or 7, characterized in that at least one first liquid pump (264) is arranged in the at least one feed line (254). Printing press after Claim 1 and / or 2 and / or 3 and / or 4 and / or 5 and / or 6 and / or 7 and / or 8, characterized in that the at least one overflow drain (258) is designed as at least one passive overflow drain (258) . Printing press after Claim 1 and / or 2 and / or 3 and / or 4 and / or 5 and / or 6 and / or 7 and / or 8 and / or 9, characterized in that at least two normal supplies (252) together with the same at least one nozzle bar (213; 413) are movably arranged and that each of these at least two normal supplies (252) is connected and / or connectable to at least one of the at least two print heads via at least one first liquid line (253). Printing press after Claim 10 , characterized in that the at least two print heads (212; 412) are arranged relative to one another at different heights on the at least one nozzle bar (213; 413) and that vertical distances of each of the at least two print heads (212; 412) to the respective, with normal supply (252) connected to it via a first liquid line (253) are equal to a tolerance value of at most 1 cm.

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